621647932 has 12 divisors (see below), whose sum is σ = 1092399616. Its totient is φ = 309533760.

The previous prime is 621647837. The next prime is 621647953. The reversal of 621647932 is 239746126.

It is a happy number.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

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, 321468 + ... + 323395.

Almost surely, 2^621647932 is an apocalyptic number.

It is an amenable number.

621647932 is a deficient number, since it is larger than the sum of its proper divisors (470751684).

621647932 is a wasteful number, since it uses less digits than its factorization.

621647932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645108 (or 645106 counting only the distinct ones).

The product of its digits is 108864, while the sum is 40.

The square root of 621647932 is about 24932.8685072536. The cubic root of 621647932 is about 853.4567110155.

The spelling of 621647932 in words is "six hundred twenty-one million, six hundred forty-seven thousand, nine hundred thirty-two".