15945140 has 24 divisors (see below), whose sum is σ = 33802272. Its totient is φ = 6317600.

The previous prime is 15945119. The next prime is 15945179. The reversal of 15945140 is 4154951.

It is a congruent number.

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, 1586 + ... + 5865.

It is an arithmetic number, because the mean of its divisors is an integer number (1408428).

Almost surely, 2^15945140 is an apocalyptic number.

15945140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15945140 is an abundant number, since it is smaller than the sum of its proper divisors (17857132).

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

15945140 is a wasteful number, since it uses less digits than its factorization.

15945140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7567 (or 7565 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 15945140 is about 3993.1366117377. The cubic root of 15945140 is about 251.6958832407.

The spelling of 15945140 in words is "fifteen million, nine hundred forty-five thousand, one hundred forty".