40308992 has 18 divisors (see below), whose sum is σ = 80461038. Its totient is φ = 20154368.

The previous prime is 40308979. The next prime is 40309001. The reversal of 40308992 is 29980304.

It can be written as a sum of positive squares in only one way, i.e., 26050816 + 14258176 = 5104^2 + 3776^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78473 + ... + 78984.

Almost surely, 2^40308992 is an apocalyptic number.

It is an amenable number.

40308992 is a deficient number, since it is larger than the sum of its proper divisors (40152046).

40308992 is an equidigital number, since it uses as much as digits as its factorization.

40308992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157473 (or 157459 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 40308992 is about 6348.9362888597. The cubic root of 40308992 is about 342.8735463051.

The spelling of 40308992 in words is "forty million, three hundred eight thousand, nine hundred ninety-two".