621073700 has 72 divisors (see below), whose sum is σ = 1455615168. Its totient is φ = 228654720.

The previous prime is 621073697. The next prime is 621073709. The reversal of 621073700 is 7370126.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 621073700.

It is not an unprimeable number, because it can be changed into a prime (621073709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 835529 + ... + 836271.

Almost surely, 2^621073700 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 621073700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (727807584).

621073700 is an abundant number, since it is smaller than the sum of its proper divisors (834541468).

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

621073700 is a wasteful number, since it uses less digits than its factorization.

621073700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1413 (or 1406 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 26.

The square root of 621073700 is about 24921.3502844449. The cubic root of 621073700 is about 853.1938435055.

The spelling of 621073700 in words is "six hundred twenty-one million, seventy-three thousand, seven hundred".