11904949840 has 120 divisors (see below), whose sum is σ = 33237015552. Its totient is φ = 3949989120.

The previous prime is 11904949831. The next prime is 11904949843. The reversal of 11904949840 is 4894940911.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11904949843) 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, 72537 + ... + 170503.

Almost surely, 2^11904949840 is an apocalyptic number.

11904949840 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 11904949840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16618507776).

11904949840 is an abundant number, since it is smaller than the sum of its proper divisors (21332065712).

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

11904949840 is a wasteful number, since it uses less digits than its factorization.

11904949840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98025 (or 98012 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 49.

The spelling of 11904949840 in words is "eleven billion, nine hundred four million, nine hundred forty-nine thousand, eight hundred forty".