621052704 has 96 divisors (see below), whose sum is σ = 1918002240. Its totient is φ = 194835456.

The previous prime is 621052637. The next prime is 621052709. The reversal of 621052704 is 407250126.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×621052704² = 771412922291423232, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (621052709) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6454 + ... + 35829.

It is an arithmetic number, because the mean of its divisors is an integer number (19979190).

Almost surely, 2^621052704 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 621052704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (959001120).

621052704 is an abundant number, since it is smaller than the sum of its proper divisors (1296949536).

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

621052704 is a wasteful number, since it uses less digits than its factorization.

621052704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42319 (or 42305 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 621052704 is about 24920.9290356519. The cubic root of 621052704 is about 853.1842290481.

The spelling of 621052704 in words is "six hundred twenty-one million, fifty-two thousand, seven hundred four".