93978720 has 288 divisors, whose sum is σ = 371498400. Its totient is φ = 21381120.

The previous prime is 93978719. The next prime is 93978727. The reversal of 93978720 is 2787939.

It is a tau number, because it is divible by the number of its divisors (288).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (93978727) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 269106 + ... + 269454.

It is an arithmetic number, because the mean of its divisors is an integer number (1289925).

Almost surely, 2^93978720 is an apocalyptic number.

93978720 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 93978720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (185749200).

93978720 is an abundant number, since it is smaller than the sum of its proper divisors (277519680).

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

93978720 is a wasteful number, since it uses less digits than its factorization.

93978720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398 (or 387 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 45.

The square root of 93978720 is about 9694.2622205096. The cubic root of 93978720 is about 454.6492809127.

The spelling of 93978720 in words is "ninety-three million, nine hundred seventy-eight thousand, seven hundred twenty".