621384026 has 16 divisors (see below), whose sum is σ = 968529408. Its totient is φ = 298674000.

The previous prime is 621384019. The next prime is 621384061. The reversal of 621384026 is 620483126.

It is a super-2 number, since 2×621384026² = 772236215535937352, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 621383983 and 621384001.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23825 + ... + 42548.

It is an arithmetic number, because the mean of its divisors is an integer number (60533088).

Almost surely, 2^621384026 is an apocalyptic number.

621384026 is a deficient number, since it is larger than the sum of its proper divisors (347145382).

621384026 is a wasteful number, since it uses less digits than its factorization.

621384026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66557.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 621384026 is about 24927.5756141667. The cubic root of 621384026 is about 853.3359222673.

The spelling of 621384026 in words is "six hundred twenty-one million, three hundred eighty-four thousand, twenty-six".