621040654 has 16 divisors (see below), whose sum is σ = 1003630320. Its totient is φ = 286516800.

The previous prime is 621040649. The next prime is 621040681. The reversal of 621040654 is 456040126.

It is a congruent number.

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, 120429 + ... + 125479.

It is an arithmetic number, because the mean of its divisors is an integer number (62726895).

Almost surely, 2^621040654 is an apocalyptic number.

621040654 is a deficient number, since it is larger than the sum of its proper divisors (382589666).

621040654 is a wasteful number, since it uses less digits than its factorization.

621040654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9795.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 621040654 is about 24920.6872698166. The cubic root of 621040654 is about 853.1787110320.

It can be divided in two parts, 6210 and 40654, that added together give a palindrome (46864).

The spelling of 621040654 in words is "six hundred twenty-one million, forty thousand, six hundred fifty-four".