15202040240 has 40 divisors (see below), whose sum is σ = 35350811808. Its totient is φ = 6079772160.

The previous prime is 15202040209. The next prime is 15202040267. The reversal of 15202040240 is 4204020251.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×15202040240² (a number of 21 digits) contains 22 as substring.

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

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, 594764 + ... + 619796.

Almost surely, 2^15202040240 is an apocalyptic number.

15202040240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15202040240 is an abundant number, since it is smaller than the sum of its proper divisors (20148771568).

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

15202040240 is a wasteful number, since it uses less digits than its factorization.

15202040240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32637 (or 32631 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

Adding to 15202040240 its reverse (4204020251), we get a palindrome (19406060491).

The spelling of 15202040240 in words is "fifteen billion, two hundred two million, forty thousand, two hundred forty".