40497236 has 12 divisors (see below), whose sum is σ = 76321812. Its totient is φ = 18691008.

The previous prime is 40497173. The next prime is 40497239. The reversal of 40497236 is 63279404.

It can be written as a sum of positive squares in 2 ways, for example, as 13912900 + 26584336 = 3730^2 + 5156^2 .

It is a super-2 number, since 2×40497236² = 3280052247279392, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40497196 and 40497205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40497239) 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, 389345 + ... + 389448.

It is an arithmetic number, because the mean of its divisors is an integer number (6360151).

Almost surely, 2^40497236 is an apocalyptic number.

It is an amenable number.

40497236 is a deficient number, since it is larger than the sum of its proper divisors (35824576).

40497236 is a wasteful number, since it uses less digits than its factorization.

40497236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778810 (or 778808 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 40497236 is about 6363.7438666244. The cubic root of 40497236 is about 343.4064602669.

The spelling of 40497236 in words is "forty million, four hundred ninety-seven thousand, two hundred thirty-six".