43387972 has 12 divisors (see below), whose sum is σ = 78378496. Its totient is φ = 20994120.

The previous prime is 43387969. The next prime is 43387987. The reversal of 43387972 is 27978334.

It is a super-2 number, since 2×43387972² = 3765032228545568, 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, 174828 + ... + 175075.

Almost surely, 2^43387972 is an apocalyptic number.

It is an amenable number.

43387972 is a deficient number, since it is larger than the sum of its proper divisors (34990524).

43387972 is a wasteful number, since it uses less digits than its factorization.

43387972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349938 (or 349936 counting only the distinct ones).

The product of its digits is 254016, while the sum is 43.

The square root of 43387972 is about 6586.9546833116. The cubic root of 43387972 is about 351.3903120992.

The spelling of 43387972 in words is "forty-three million, three hundred eighty-seven thousand, nine hundred seventy-two".