621690024 has 16 divisors (see below), whose sum is σ = 1554225120. Its totient is φ = 207230000.

The previous prime is 621689927. The next prime is 621690031. The reversal of 621690024 is 420096126.

It is a super-2 number, since 2×621690024² = 772996971882241152, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 621689973 and 621690000.

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, 12951852 + ... + 12951899.

It is an arithmetic number, because the mean of its divisors is an integer number (97139070).

Almost surely, 2^621690024 is an apocalyptic number.

It is an amenable number.

621690024 is an abundant number, since it is smaller than the sum of its proper divisors (932535096).

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

621690024 is a wasteful number, since it uses less digits than its factorization.

621690024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25903760 (or 25903756 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 621690024 is about 24933.7125996110. The cubic root of 621690024 is about 853.4759731987.

The spelling of 621690024 in words is "six hundred twenty-one million, six hundred ninety thousand, twenty-four".