15240023400 has 192 divisors, whose sum is σ = 54089930880. Its totient is φ = 3477196800.

The previous prime is 15240023387. The next prime is 15240023401. The reversal of 15240023400 is 432004251.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (15240023401) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2588460 + ... + 2594340.

It is an arithmetic number, because the mean of its divisors is an integer number (281718390).

Almost surely, 2^15240023400 is an apocalyptic number.

15240023400 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 15240023400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27044965440).

15240023400 is an abundant number, since it is smaller than the sum of its proper divisors (38849907480).

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

15240023400 is a wasteful number, since it uses less digits than its factorization.

15240023400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6524 (or 6515 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

Adding to 15240023400 its reverse (432004251), we get a palindrome (15672027651).

The spelling of 15240023400 in words is "fifteen billion, two hundred forty million, twenty-three thousand, four hundred".