11898780 has 24 divisors (see below), whose sum is σ = 33316752. Its totient is φ = 3172992.

The previous prime is 11898763. The next prime is 11898791. The reversal of 11898780 is 8789811.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99097 + ... + 99216.

It is an arithmetic number, because the mean of its divisors is an integer number (1388198).

Almost surely, 2^11898780 is an apocalyptic number.

11898780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11898780 is an abundant number, since it is smaller than the sum of its proper divisors (21417972).

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

11898780 is a wasteful number, since it uses less digits than its factorization.

11898780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198325 (or 198323 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 42.

The square root of 11898780 is about 3449.4608274338. The cubic root of 11898780 is about 228.2973191049.

The spelling of 11898780 in words is "eleven million, eight hundred ninety-eight thousand, seven hundred eighty".