621954854 has 16 divisors (see below), whose sum is σ = 1002931200. Its totient is φ = 288341064.

The previous prime is 621954847. The next prime is 621954859. The reversal of 621954854 is 458459126.

It is a super-2 number, since 2×621954854² = 773655680828322632, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621954859) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172334 + ... + 175905.

It is an arithmetic number, because the mean of its divisors is an integer number (62683200).

Almost surely, 2^621954854 is an apocalyptic number.

621954854 is a deficient number, since it is larger than the sum of its proper divisors (380976346).

621954854 is a wasteful number, since it uses less digits than its factorization.

621954854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348307.

The product of its digits is 345600, while the sum is 44.

The square root of 621954854 is about 24939.0227154153. The cubic root of 621954854 is about 853.5971450295.

The spelling of 621954854 in words is "six hundred twenty-one million, nine hundred fifty-four thousand, eight hundred fifty-four".