11947900 has 36 divisors (see below), whose sum is σ = 26121592. Its totient is φ = 4743360.

The previous prime is 11947891. The next prime is 11947931. The reversal of 11947900 is 974911.

11947900 = 138² + 139² + ... + 337².

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15934 + ... + 16666.

Almost surely, 2^11947900 is an apocalyptic number.

11947900 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 11947900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13060796).

11947900 is an abundant number, since it is smaller than the sum of its proper divisors (14173692).

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

11947900 is a wasteful number, since it uses less digits than its factorization.

11947900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 910 (or 903 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 31.

The square root of 11947900 is about 3456.5734477948. The cubic root of 11947900 is about 228.6110366629.

The spelling of 11947900 in words is "eleven million, nine hundred forty-seven thousand, nine hundred".