15040000 has 100 divisors (see below), whose sum is σ = 38350224. Its totient is φ = 5888000.

The previous prime is 15039967. The next prime is 15040007. The reversal of 15040000 is 4051.

It is a tau number, because it is divible by the number of its divisors (100).

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15040007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 319977 + ... + 320023.

Almost surely, 2^15040000 is an apocalyptic number.

15040000 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 15040000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19175112).

15040000 is an abundant number, since it is smaller than the sum of its proper divisors (23310224).

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

15040000 is an frugal number, since it uses more digits than its factorization.

15040000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85 (or 54 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 10.

The square root of 15040000 is about 3878.1438859331. The cubic root of 15040000 is about 246.8402317111.

Adding to 15040000 its reverse (4051), we get a palindrome (15044051).

The spelling of 15040000 in words is "fifteen million, forty thousand".