52138578 has 32 divisors (see below), whose sum is σ = 109267200. Its totient is φ = 16563456.

The previous prime is 52138577. The next prime is 52138579. The reversal of 52138578 is 87583125.

It is an interprime number because it is at equal distance from previous prime (52138577) and next prime (52138579).

It is not an unprimeable number, because it can be changed into a prime (52138573) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11850 + ... + 15642.

It is an arithmetic number, because the mean of its divisors is an integer number (3414600).

Almost surely, 2^52138578 is an apocalyptic number.

52138578 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

52138578 is an abundant number, since it is smaller than the sum of its proper divisors (57128622).

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

52138578 is a wasteful number, since it uses less digits than its factorization.

52138578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3906.

The product of its digits is 67200, while the sum is 39.

The square root of 52138578 is about 7220.7048132436. The cubic root of 52138578 is about 373.5823882021.

The spelling of 52138578 in words is "fifty-two million, one hundred thirty-eight thousand, five hundred seventy-eight".