40391052 has 24 divisors (see below), whose sum is σ = 101495856. Its totient is φ = 12427968.

The previous prime is 40391003. The next prime is 40391053. The reversal of 40391052 is 25019304.

It is not an unprimeable number, because it can be changed into a prime (40391053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129303 + ... + 129614.

It is an arithmetic number, because the mean of its divisors is an integer number (4228994).

Almost surely, 2^40391052 is an apocalyptic number.

It is an amenable number.

40391052 is an abundant number, since it is smaller than the sum of its proper divisors (61104804).

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

40391052 is a wasteful number, since it uses less digits than its factorization.

40391052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258937 (or 258935 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 40391052 is about 6355.3955030352. The cubic root of 40391052 is about 343.1060596179.

The spelling of 40391052 in words is "forty million, three hundred ninety-one thousand, fifty-two".