621494100 has 144 divisors (see below), whose sum is σ = 2006538240. Its totient is φ = 165024000.

The previous prime is 621494057. The next prime is 621494117. The reversal of 621494100 is 1494126.

621494100 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1033800 + ... + 1034400.

Almost surely, 2^621494100 is an apocalyptic number.

621494100 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 621494100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1003269120).

621494100 is an abundant number, since it is smaller than the sum of its proper divisors (1385044140).

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

621494100 is a wasteful number, since it uses less digits than its factorization.

621494100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1007 (or 994 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 621494100 is about 24929.7833925608. The cubic root of 621494100 is about 853.3863068650.

The spelling of 621494100 in words is "six hundred twenty-one million, four hundred ninety-four thousand, one hundred".