15402304240 has 40 divisors (see below), whose sum is σ = 35816444208. Its totient is φ = 6159874560.

The previous prime is 15402304217. The next prime is 15402304243. The reversal of 15402304240 is 4240320451.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15402304243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 602764 + ... + 627796.

Almost surely, 2^15402304240 is an apocalyptic number.

15402304240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15402304240 is an abundant number, since it is smaller than the sum of its proper divisors (20414139968).

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

15402304240 is a wasteful number, since it uses less digits than its factorization.

15402304240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32737 (or 32731 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

Adding to 15402304240 its reverse (4240320451), we get a palindrome (19642624691).

The spelling of 15402304240 in words is "fifteen billion, four hundred two million, three hundred four thousand, two hundred forty".