11898778392 has 64 divisors (see below), whose sum is σ = 33470592000. Its totient is φ = 3916048032.

The previous prime is 11898778373. The next prime is 11898778421. The reversal of 11898778392 is 29387789811.

It is a super-2 number, since 2×11898778392² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 331588 + ... + 365715.

It is an arithmetic number, because the mean of its divisors is an integer number (522978000).

Almost surely, 2^11898778392 is an apocalyptic number.

11898778392 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11898778392 is an abundant number, since it is smaller than the sum of its proper divisors (21571813608).

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

11898778392 is a wasteful number, since it uses less digits than its factorization.

11898778392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 697397 (or 697387 counting only the distinct ones).

The product of its digits is 12192768, while the sum is 63.

The spelling of 11898778392 in words is "eleven billion, eight hundred ninety-eight million, seven hundred seventy-eight thousand, three hundred ninety-two".