621789696 has 400 divisors, whose sum is σ = 2138970240. Its totient is φ = 178053120.

The previous prime is 621789677. The next prime is 621789709. The reversal of 621789696 is 696987126.

621789696 is a `hidden beast` number, since 621 + 7 + 8 + 9 + 6 + 9 + 6 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 13229545 + ... + 13229591.

Almost surely, 2^621789696 is an apocalyptic number.

621789696 is a gapful number since it is divisible by the number (66) 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 621789696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1069485120).

621789696 is an abundant number, since it is smaller than the sum of its proper divisors (1517180544).

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

621789696 is a wasteful number, since it uses less digits than its factorization.

621789696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117 (or 92 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 54.

The square root of 621789696 is about 24935.7112591560. The cubic root of 621789696 is about 853.5215817326.

The spelling of 621789696 in words is "six hundred twenty-one million, seven hundred eighty-nine thousand, six hundred ninety-six".