40724978 has 24 divisors (see below), whose sum is σ = 71563500. Its totient is φ = 17330208.

The previous prime is 40724977. The next prime is 40724987. The reversal of 40724978 is 87942704.

It can be written as a sum of positive squares in 2 ways, for example, as 39778249 + 946729 = 6307^2 + 973^2 .

It is not an unprimeable number, because it can be changed into a prime (40724977) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13208 + ... + 15996.

Almost surely, 2^40724978 is an apocalyptic number.

40724978 is a deficient number, since it is larger than the sum of its proper divisors (30838522).

40724978 is a wasteful number, since it uses less digits than its factorization.

40724978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2954 (or 2947 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 41.

The square root of 40724978 is about 6381.6124921527. The cubic root of 40724978 is about 344.0489891021.

The spelling of 40724978 in words is "forty million, seven hundred twenty-four thousand, nine hundred seventy-eight".