15628140 has 120 divisors (see below), whose sum is σ = 53543952. Its totient is φ = 3784320.

The previous prime is 15628103. The next prime is 15628141. The reversal of 15628140 is 4182651.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (15628141) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 17382 + ... + 18258.

Almost surely, 2^15628140 is an apocalyptic number.

15628140 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 15628140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26771976).

15628140 is an abundant number, since it is smaller than the sum of its proper divisors (37915812).

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

15628140 is a wasteful number, since it uses less digits than its factorization.

15628140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909 (or 898 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 15628140 is about 3953.2442373322. The cubic root of 15628140 is about 250.0167455450.

The spelling of 15628140 in words is "fifteen million, six hundred twenty-eight thousand, one hundred forty".