43138624 has 21 divisors (see below), whose sum is σ = 85707601. Its totient is φ = 21543040.

The previous prime is 43138619. The next prime is 43138663. The reversal of 43138624 is 42683134.

The square root of 43138624 is 6568.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 11778624 + 31360000 = 3432^2 + 5600^2 .

It is a super-2 number, since 2×43138624² = 3721881761226752, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 52134 + ... + 52954.

Almost surely, 2^43138624 is an apocalyptic number.

43138624 is the 6568-th square number.

It is an amenable number.

43138624 is a deficient number, since it is larger than the sum of its proper divisors (42568977).

43138624 is an frugal number, since it uses more digits than its factorization.

43138624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1654 (or 823 counting only the distinct ones).

The product of its digits is 13824, while the sum is 31.

The cubic root of 43138624 is about 350.7158789830.

The spelling of 43138624 in words is "forty-three million, one hundred thirty-eight thousand, six hundred twenty-four".