15628940 has 24 divisors (see below), whose sum is σ = 32895072. Its totient is φ = 6237440.

The previous prime is 15628919. The next prime is 15628961. The reversal of 15628940 is 4982651.

It is an interprime number because it is at equal distance from previous prime (15628919) and next prime (15628961).

It is a self number, because there is not a number n which added to its sum of digits gives 15628940.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17177 + ... + 18063.

It is an arithmetic number, because the mean of its divisors is an integer number (1370628).

Almost surely, 2^15628940 is an apocalyptic number.

15628940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15628940 is an abundant number, since it is smaller than the sum of its proper divisors (17266132).

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

15628940 is a wasteful number, since it uses less digits than its factorization.

15628940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1777 (or 1775 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 15628940 is about 3953.3454187561. The cubic root of 15628940 is about 250.0210115673.

The spelling of 15628940 in words is "fifteen million, six hundred twenty-eight thousand, nine hundred forty".