40390938 has 24 divisors (see below), whose sum is σ = 100015968. Its totient is φ = 11540232.

The previous prime is 40390927. The next prime is 40390951. The reversal of 40390938 is 83909304.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 160156 + ... + 160407.

It is an arithmetic number, because the mean of its divisors is an integer number (4167332).

Almost surely, 2^40390938 is an apocalyptic number.

40390938 is an abundant number, since it is smaller than the sum of its proper divisors (59625030).

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

40390938 is a wasteful number, since it uses less digits than its factorization.

40390938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320578 (or 320575 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 40390938 is about 6355.3865342715. The cubic root of 40390938 is about 343.1057368226.

It can be divided in two parts, 40390 and 938, that added together give a triangular number (41328 = T₂₈₇).

The spelling of 40390938 in words is "forty million, three hundred ninety thousand, nine hundred thirty-eight".