621489612 has 48 divisors (see below), whose sum is σ = 1499359232. Its totient is φ = 200154240.

The previous prime is 621489593. The next prime is 621489619. The reversal of 621489612 is 216984126.

It is not an unprimeable number, because it can be changed into a prime (621489619) 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, 347673 + ... + 349455.

Almost surely, 2^621489612 is an apocalyptic number.

621489612 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

621489612 is an abundant number, since it is smaller than the sum of its proper divisors (877869620).

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

621489612 is a wasteful number, since it uses less digits than its factorization.

621489612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2758 (or 2756 counting only the distinct ones).

The product of its digits is 41472, while the sum is 39.

The square root of 621489612 is about 24929.6933795825. The cubic root of 621489612 is about 853.3842526717.

The spelling of 621489612 in words is "six hundred twenty-one million, four hundred eighty-nine thousand, six hundred twelve".