40649972 has 24 divisors (see below), whose sum is σ = 78768480. Its totient is φ = 18200160.

The previous prime is 40649963. The next prime is 40649989. The reversal of 40649972 is 27994604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3947 + ... + 9842.

It is an arithmetic number, because the mean of its divisors is an integer number (3282020).

Almost surely, 2^40649972 is an apocalyptic number.

It is an amenable number.

40649972 is a deficient number, since it is larger than the sum of its proper divisors (38118508).

40649972 is a wasteful number, since it uses less digits than its factorization.

40649972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13871 (or 13869 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 40649972 is about 6375.7330558925. The cubic root of 40649972 is about 343.8376397148.

The spelling of 40649972 in words is "forty million, six hundred forty-nine thousand, nine hundred seventy-two".