620379840 has 224 divisors, whose sum is σ = 2044232640. Its totient is φ = 159318016.

The previous prime is 620379797. The next prime is 620379841. The reversal of 620379840 is 48973026.

620379840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×620379840² = 769742291756851200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (620379841) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4528252 + ... + 4528388.

Almost surely, 2^620379840 is an apocalyptic number.

620379840 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 620379840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1022116320).

620379840 is an abundant number, since it is smaller than the sum of its proper divisors (1423852800).

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

620379840 is a wasteful number, since it uses less digits than its factorization.

620379840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299 (or 289 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 620379840 is about 24907.4253988645. The cubic root of 620379840 is about 852.8759973434.

The spelling of 620379840 in words is "six hundred twenty million, three hundred seventy-nine thousand, eight hundred forty".