11990258280 has 640 divisors, whose sum is σ = 54124519680. Its totient is φ = 2299207680.

The previous prime is 11990258279. The next prime is 11990258297. The reversal of 11990258280 is 8285209911.

11990258280 is a `hidden beast` number, since 119 + 9 + 0 + 258 + 280 = 666.

It is a super-2 number, since 2×11990258280² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 3241392 + ... + 3245088.

It is an arithmetic number, because the mean of its divisors is an integer number (84569562).

Almost surely, 2^11990258280 is an apocalyptic number.

11990258280 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 11990258280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27062259840).

11990258280 is an abundant number, since it is smaller than the sum of its proper divisors (42134261400).

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

11990258280 is a wasteful number, since it uses less digits than its factorization.

11990258280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3751 (or 3738 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 45.

The spelling of 11990258280 in words is "eleven billion, nine hundred ninety million, two hundred fifty-eight thousand, two hundred eighty".