11917472280 has 384 divisors, whose sum is σ = 43968614400. Its totient is φ = 2572372992.

The previous prime is 11917472227. The next prime is 11917472291. The reversal of 11917472280 is 8227471911.

It is a super-2 number, since 2×11917472280² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 8013697 + ... + 8015183.

It is an arithmetic number, because the mean of its divisors is an integer number (114501600).

Almost surely, 2^11917472280 is an apocalyptic number.

11917472280 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 11917472280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21984307200).

11917472280 is an abundant number, since it is smaller than the sum of its proper divisors (32051142120).

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

11917472280 is a wasteful number, since it uses less digits than its factorization.

11917472280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1591 (or 1580 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 42.

The spelling of 11917472280 in words is "eleven billion, nine hundred seventeen million, four hundred seventy-two thousand, two hundred eighty".