40857912 has 128 divisors (see below), whose sum is σ = 119750400. Its totient is φ = 12894336.

The previous prime is 40857911. The next prime is 40857967. The reversal of 40857912 is 21975804.

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 (40857911) 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, 492223 + ... + 492305.

It is an arithmetic number, because the mean of its divisors is an integer number (935550).

Almost surely, 2^40857912 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 40857912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59875200).

40857912 is an abundant number, since it is smaller than the sum of its proper divisors (78892488).

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

40857912 is a wasteful number, since it uses less digits than its factorization.

40857912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194 (or 184 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 40857912 is about 6392.0193992196. The cubic root of 40857912 is about 344.4229294304.

The spelling of 40857912 in words is "forty million, eight hundred fifty-seven thousand, nine hundred twelve".