53864388 has 36 divisors (see below), whose sum is σ = 137372508. Its totient is φ = 17794560.

The previous prime is 53864387. The next prime is 53864401. The reversal of 53864388 is 88346835.

It can be written as a sum of positive squares in 2 ways, for example, as 28643904 + 25220484 = 5352^2 + 5022^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×53864388² = 5802744589229088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (53864387) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2553 + ... + 10688.

It is an arithmetic number, because the mean of its divisors is an integer number (3815903).

Almost surely, 2^53864388 is an apocalyptic number.

It is an amenable number.

53864388 is an abundant number, since it is smaller than the sum of its proper divisors (83508120).

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

53864388 is a wasteful number, since it uses less digits than its factorization.

53864388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13364 (or 13359 counting only the distinct ones).

The product of its digits is 552960, while the sum is 45.

The square root of 53864388 is about 7339.2362000415. The cubic root of 53864388 is about 377.6596415565.

The spelling of 53864388 in words is "fifty-three million, eight hundred sixty-four thousand, three hundred eighty-eight".