11905979904 has 240 divisors, whose sum is σ = 42292522272. Its totient is φ = 3139928064.

The previous prime is 11905979881. The next prime is 11905979909. The reversal of 11905979904 is 40997950911.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11905979909) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 405132 + ... + 433524.

Almost surely, 2^11905979904 is an apocalyptic number.

11905979904 is a gapful number since it is divisible by the number (14) 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 11905979904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21146261136).

11905979904 is an abundant number, since it is smaller than the sum of its proper divisors (30386542368).

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

11905979904 is a wasteful number, since it uses less digits than its factorization.

11905979904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28437 (or 28418 counting only the distinct ones).

The product of its (nonzero) digits is 918540, while the sum is 54.

The spelling of 11905979904 in words is "eleven billion, nine hundred five million, nine hundred seventy-nine thousand, nine hundred four".