52643820 has 24 divisors (see below), whose sum is σ = 147402864. Its totient is φ = 14038336.

The previous prime is 52643819. The next prime is 52643821. The reversal of 52643820 is 2834625.

It is an interprime number because it is at equal distance from previous prime (52643819) and next prime (52643821).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (52643821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 438639 + ... + 438758.

It is an arithmetic number, because the mean of its divisors is an integer number (6141786).

Almost surely, 2^52643820 is an apocalyptic number.

It is an amenable number.

52643820 is an abundant number, since it is smaller than the sum of its proper divisors (94759044).

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

52643820 is a wasteful number, since it uses less digits than its factorization.

52643820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 877409 (or 877407 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 52643820 is about 7255.6061083827. The cubic root of 52643820 is about 374.7852281294.

The spelling of 52643820 in words is "fifty-two million, six hundred forty-three thousand, eight hundred twenty".