15420257280 has 352 divisors, whose sum is σ = 55129476480. Its totient is φ = 4087480320.

The previous prime is 15420257267. The next prime is 15420257299. The reversal of 15420257280 is 8275202451.

It is a happy number.

15420257280 is a `hidden beast` number, since 1 + 5 + 4 + 2 + 0 + 2 + 572 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45757272 + ... + 45757608.

Almost surely, 2^15420257280 is an apocalyptic number.

15420257280 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 15420257280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27564738240).

15420257280 is an abundant number, since it is smaller than the sum of its proper divisors (39709219200).

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

15420257280 is a wasteful number, since it uses less digits than its factorization.

15420257280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702 (or 678 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 36.

The spelling of 15420257280 in words is "fifteen billion, four hundred twenty million, two hundred fifty-seven thousand, two hundred eighty".