620355840 has 432 divisors, whose sum is σ = 2319269568. Its totient is φ = 140378112.

The previous prime is 620355829. The next prime is 620355851. The reversal of 620355840 is 48553026.

It is an interprime number because it is at equal distance from previous prime (620355829) and next prime (620355851).

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, 14426859 + ... + 14426901.

Almost surely, 2^620355840 is an apocalyptic number.

620355840 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 620355840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1159634784).

620355840 is an abundant number, since it is smaller than the sum of its proper divisors (1698913728).

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

620355840 is a wasteful number, since it uses less digits than its factorization.

620355840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114 (or 83 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 33.

The square root of 620355840 is about 24906.9436101662. The cubic root of 620355840 is about 852.8649990879.

The spelling of 620355840 in words is "six hundred twenty million, three hundred fifty-five thousand, eight hundred forty".