11897172 has 48 divisors (see below), whose sum is σ = 35253120. Its totient is φ = 3398976.

The previous prime is 11897143. The next prime is 11897191. The reversal of 11897172 is 27179811.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7113 + ... + 8624.

It is an arithmetic number, because the mean of its divisors is an integer number (734440).

Almost surely, 2^11897172 is an apocalyptic number.

11897172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11897172 is an abundant number, since it is smaller than the sum of its proper divisors (23355948).

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

11897172 is a wasteful number, since it uses less digits than its factorization.

11897172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15757 (or 15749 counting only the distinct ones).

The product of its digits is 7056, while the sum is 36.

The square root of 11897172 is about 3449.2277396542. The cubic root of 11897172 is about 228.2870346155.

The spelling of 11897172 in words is "eleven million, eight hundred ninety-seven thousand, one hundred seventy-two".