40309616 has 20 divisors (see below), whose sum is σ = 81496272. Its totient is φ = 19278336.

The previous prime is 40309589. The next prime is 40309637. The reversal of 40309616 is 61690304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54401 + ... + 55136.

Almost surely, 2^40309616 is an apocalyptic number.

40309616 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

It is an amenable number.

40309616 is an abundant number, since it is smaller than the sum of its proper divisors (41186656).

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

40309616 is a wasteful number, since it uses less digits than its factorization.

40309616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109568 (or 109562 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 40309616 is about 6348.9854307598. The cubic root of 40309616 is about 342.8753155712.

The spelling of 40309616 in words is "forty million, three hundred nine thousand, six hundred sixteen".