15020040 has 64 divisors (see below), whose sum is σ = 51500160. Its totient is φ = 3432960.

The previous prime is 15020023. The next prime is 15020053. The reversal of 15020040 is 4002051.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 15019998 and 15020025.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8101 + ... + 9780.

It is an arithmetic number, because the mean of its divisors is an integer number (804690).

Almost surely, 2^15020040 is an apocalyptic number.

15020040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15020040 is an abundant number, since it is smaller than the sum of its proper divisors (36480120).

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

15020040 is a wasteful number, since it uses less digits than its factorization.

15020040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17902 (or 17898 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 15020040 is about 3875.5696355504. The cubic root of 15020040 is about 246.7309872033.

Adding to 15020040 its reverse (4002051), we get a palindrome (19022091).

The spelling of 15020040 in words is "fifteen million, twenty thousand, forty".