621093408 has 48 divisors (see below), whose sum is σ = 1755786816. Its totient is φ = 191105280.

The previous prime is 621093397. The next prime is 621093409. The reversal of 621093408 is 804390126.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×621093408² = 771514042922108928, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (621093409) 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, 247588 + ... + 250083.

It is an arithmetic number, because the mean of its divisors is an integer number (36578892).

Almost surely, 2^621093408 is an apocalyptic number.

It is an amenable number.

621093408 is an abundant number, since it is smaller than the sum of its proper divisors (1134693408).

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

621093408 is a wasteful number, since it uses less digits than its factorization.

621093408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497697 (or 497689 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 621093408 is about 24921.7456852444. The cubic root of 621093408 is about 853.2028679666.

The spelling of 621093408 in words is "six hundred twenty-one million, ninety-three thousand, four hundred eight".