40139432 has 16 divisors (see below), whose sum is σ = 76385760. Its totient is φ = 19769904.

The previous prime is 40139423. The next prime is 40139443. The reversal of 40139432 is 23493104.

It is a super-2 number, since 2×40139432² = 3222348002565248, which contains 22 as substring.

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, 36908 + ... + 37979.

It is an arithmetic number, because the mean of its divisors is an integer number (4774110).

Almost surely, 2^40139432 is an apocalyptic number.

It is an amenable number.

40139432 is a deficient number, since it is larger than the sum of its proper divisors (36246328).

40139432 is a wasteful number, since it uses less digits than its factorization.

40139432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74960 (or 74956 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 40139432 is about 6335.5687984584. The cubic root of 40139432 is about 342.3921041138.

The spelling of 40139432 in words is "forty million, one hundred thirty-nine thousand, four hundred thirty-two".