52724138 has 4 divisors (see below), whose sum is σ = 79086210. Its totient is φ = 26362068.

The previous prime is 52724137. The next prime is 52724159. The reversal of 52724138 is 83142725.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 40284409 + 12439729 = 6347^2 + 3527^2 .

It is not an unprimeable number, because it can be changed into a prime (52724137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13181033 + ... + 13181036.

Almost surely, 2^52724138 is an apocalyptic number.

52724138 is a deficient number, since it is larger than the sum of its proper divisors (26362072).

52724138 is a wasteful number, since it uses less digits than its factorization.

52724138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26362071.

The product of its digits is 13440, while the sum is 32.

The square root of 52724138 is about 7261.1388913861. The cubic root of 52724138 is about 374.9757329482.

The spelling of 52724138 in words is "fifty-two million, seven hundred twenty-four thousand, one hundred thirty-eight".