9957420 has 144 divisors (see below), whose sum is σ = 33965568. Its totient is φ = 2340480.

The previous prime is 9957407. The next prime is 9957439. The reversal of 9957420 is 247599.

9957420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 93007 + ... + 93113.

It is an arithmetic number, because the mean of its divisors is an integer number (235872).

Almost surely, 2^9957420 is an apocalyptic number.

9957420 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9957420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16982784).

9957420 is an abundant number, since it is smaller than the sum of its proper divisors (24008148).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9957420 is a wasteful number, since it uses less digits than its factorization.

9957420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180 (or 175 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 9957420 is about 3155.5379889965. The cubic root of 9957420 is about 215.1372478642.

The spelling of 9957420 in words is "nine million, nine hundred fifty-seven thousand, four hundred twenty".