40781892 has 12 divisors (see below), whose sum is σ = 95157776. Its totient is φ = 13593960.

The previous prime is 40781887. The next prime is 40781893. The reversal of 40781892 is 29818704.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 40781892.

It is not an unprimeable number, because it can be changed into a prime (40781893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1699234 + ... + 1699257.

Almost surely, 2^40781892 is an apocalyptic number.

It is an amenable number.

40781892 is an abundant number, since it is smaller than the sum of its proper divisors (54375884).

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

40781892 is a wasteful number, since it uses less digits than its factorization.

40781892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3398498 (or 3398496 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 40781892 is about 6386.0701530754. The cubic root of 40781892 is about 344.2091863609.

The spelling of 40781892 in words is "forty million, seven hundred eighty-one thousand, eight hundred ninety-two".