52621830 has 48 divisors (see below), whose sum is σ = 144022320. Its totient is φ = 13293504.

The previous prime is 52621813. The next prime is 52621841. The reversal of 52621830 is 3812625.

52621830 is a `hidden beast` number, since 5 + 2 + 621 + 8 + 30 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 52621794 and 52621803.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13677 + ... + 17096.

It is an arithmetic number, because the mean of its divisors is an integer number (3000465).

Almost surely, 2^52621830 is an apocalyptic number.

52621830 is an abundant number, since it is smaller than the sum of its proper divisors (91400490).

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

52621830 is a wasteful number, since it uses less digits than its factorization.

52621830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30805 (or 30802 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 52621830 is about 7254.0905701542. The cubic root of 52621830 is about 374.7330366600.

The spelling of 52621830 in words is "fifty-two million, six hundred twenty-one thousand, eight hundred thirty".