1628396520 has 128 divisors (see below), whose sum is σ = 5308416000. Its totient is φ = 398096640.

The previous prime is 1628396507. The next prime is 1628396579. The reversal of 1628396520 is 256938261.

1628396520 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1628396520² = 5303350452696220800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59161 + ... + 82199.

It is an arithmetic number, because the mean of its divisors is an integer number (41472000).

Almost surely, 2^1628396520 is an apocalyptic number.

1628396520 is a gapful number since it is divisible by the number (10) 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 1628396520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2654208000).

1628396520 is an abundant number, since it is smaller than the sum of its proper divisors (3680019480).

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

1628396520 is a wasteful number, since it uses less digits than its factorization.

1628396520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23103 (or 23099 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 1628396520 is about 40353.3953961745. The cubic root of 1628396520 is about 1176.4858871912.

The spelling of 1628396520 in words is "one billion, six hundred twenty-eight million, three hundred ninety-six thousand, five hundred twenty".