46821780 has 96 divisors (see below), whose sum is σ = 150420480. Its totient is φ = 12078720.

The previous prime is 46821763. The next prime is 46821781. The reversal of 46821780 is 8712864.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (46821781) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15342 + ... + 18138.

It is an arithmetic number, because the mean of its divisors is an integer number (1566880).

Almost surely, 2^46821780 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 46821780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75210240).

46821780 is an abundant number, since it is smaller than the sum of its proper divisors (103598700).

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

46821780 is a wasteful number, since it uses less digits than its factorization.

46821780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2846 (or 2838 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 46821780 is about 6842.6442257361. The cubic root of 46821780 is about 360.4258848627.

The spelling of 46821780 in words is "forty-six million, eight hundred twenty-one thousand, seven hundred eighty".