15250632440 has 64 divisors (see below), whose sum is σ = 35072040960. Its totient is φ = 5966835840.

The previous prime is 15250632403. The next prime is 15250632443. The reversal of 15250632440 is 4423605251.

It is a junction number, because it is equal to n+sod(n) for n = 15250632397 and 15250632406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15250632443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 339539 + ... + 381821.

It is an arithmetic number, because the mean of its divisors is an integer number (548000640).

Almost surely, 2^15250632440 is an apocalyptic number.

15250632440 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 15250632440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17536020480).

15250632440 is an abundant number, since it is smaller than the sum of its proper divisors (19821408520).

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

15250632440 is a wasteful number, since it uses less digits than its factorization.

15250632440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42492 (or 42488 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 32.

The spelling of 15250632440 in words is "fifteen billion, two hundred fifty million, six hundred thirty-two thousand, four hundred forty".