621621032 has 16 divisors (see below), whose sum is σ = 1205730900. Its totient is φ = 300092800.

The previous prime is 621620999. The next prime is 621621037. The reversal of 621621032 is 230126126.

It can be written as a sum of positive squares in 2 ways, for example, as 574369156 + 47251876 = 23966^2 + 6874^2 .

It is a junction number, because it is equal to n+sod(n) for n = 621620989 and 621621007.

It is not an unprimeable number, because it can be changed into a prime (621621037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1339469 + ... + 1339932.

Almost surely, 2^621621032 is an apocalyptic number.

It is an amenable number.

621621032 is a deficient number, since it is larger than the sum of its proper divisors (584109868).

621621032 is a wasteful number, since it uses less digits than its factorization.

621621032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2679436 (or 2679432 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 621621032 is about 24932.3290528583. The cubic root of 621621032 is about 853.4444005551. Note that the first 4 decimals are identical.

Adding to 621621032 its reverse (230126126), we get a palindrome (851747158).

The spelling of 621621032 in words is "six hundred twenty-one million, six hundred twenty-one thousand, thirty-two".