15140540 has 24 divisors (see below), whose sum is σ = 33666192. Its totient is φ = 5699840.

The previous prime is 15140519. The next prime is 15140579. The reversal of 15140540 is 4504151.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21926 + ... + 22605.

It is an arithmetic number, because the mean of its divisors is an integer number (1402758).

Almost surely, 2^15140540 is an apocalyptic number.

15140540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15140540 is an abundant number, since it is smaller than the sum of its proper divisors (18525652).

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

15140540 is a wasteful number, since it uses less digits than its factorization.

15140540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44557 (or 44555 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 15140540 is about 3891.0846816794. The cubic root of 15140540 is about 247.3890398100.

Adding to 15140540 its reverse (4504151), we get a palindrome (19644691).

The spelling of 15140540 in words is "fifteen million, one hundred forty thousand, five hundred forty".