52818642 has 30 divisors (see below), whose sum is σ = 118560519. Its totient is φ = 17575380.

The previous prime is 52818641. The next prime is 52818671. The reversal of 52818642 is 24681825.

52818642 is a `hidden beast` number, since 5 + 2 + 8 + 1 + 8 + 642 = 666.

It can be written as a sum of positive squares in only one way, i.e., 26409321 + 26409321 = 5139^2 + 5139^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=5139.

It is a junction number, because it is equal to n+sod(n) for n = 52818597 and 52818606.

It is not an unprimeable number, because it can be changed into a prime (52818641) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 92217 + ... + 92787.

Almost surely, 2^52818642 is an apocalyptic number.

52818642 is an abundant number, since it is smaller than the sum of its proper divisors (65741877).

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

52818642 is an frugal number, since it uses more digits than its factorization.

52818642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1156 (or 576 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

The square root of 52818642 is about 7267.6434970353. The cubic root of 52818642 is about 375.1996377006.

The spelling of 52818642 in words is "fifty-two million, eight hundred eighteen thousand, six hundred forty-two".