621861086 has 32 divisors (see below), whose sum is σ = 1164602880. Its totient is φ = 241941600.

The previous prime is 621861077. The next prime is 621861091. The reversal of 621861086 is 680168126.

It is a super-2 number, since 2×621861086² = 773422420562198792, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125231 + ... + 130101.

It is an arithmetic number, because the mean of its divisors is an integer number (36393840).

Almost surely, 2^621861086 is an apocalyptic number.

621861086 is a deficient number, since it is larger than the sum of its proper divisors (542741794).

621861086 is a wasteful number, since it uses less digits than its factorization.

621861086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5720.

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 621861086 is about 24937.1426991947. The cubic root of 621861086 is about 853.5542458173.

The spelling of 621861086 in words is "six hundred twenty-one million, eight hundred sixty-one thousand, eighty-six".