40640852 has 48 divisors (see below), whose sum is σ = 84040320. Its totient is φ = 16837632.

The previous prime is 40640843. The next prime is 40640857. The reversal of 40640852 is 25804604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40640857) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120428 + ... + 120764.

It is an arithmetic number, because the mean of its divisors is an integer number (1750840).

Almost surely, 2^40640852 is an apocalyptic number.

It is an amenable number.

40640852 is an abundant number, since it is smaller than the sum of its proper divisors (43399468).

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

40640852 is a wasteful number, since it uses less digits than its factorization.

40640852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480 (or 478 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 40640852 is about 6375.0178038967. The cubic root of 40640852 is about 343.8119239627.

The spelling of 40640852 in words is "forty million, six hundred forty thousand, eight hundred fifty-two".