621830324 has 6 divisors (see below), whose sum is σ = 1088203074. Its totient is φ = 310915160.

The previous prime is 621830311. The next prime is 621830411. The reversal of 621830324 is 423038126.

It can be written as a sum of positive squares in only one way, i.e., 319765924 + 302064400 = 17882^2 + 17380^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77728787 + ... + 77728794.

It is an arithmetic number, because the mean of its divisors is an integer number (181367179).

Almost surely, 2^621830324 is an apocalyptic number.

It is an amenable number.

621830324 is a deficient number, since it is larger than the sum of its proper divisors (466372750).

621830324 is a wasteful number, since it uses less digits than its factorization.

621830324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155457585 (or 155457583 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 621830324 is about 24936.5259007746. The cubic root of 621830324 is about 853.5401711473.

The spelling of 621830324 in words is "six hundred twenty-one million, eight hundred thirty thousand, three hundred twenty-four".