11922870 has 16 divisors (see below), whose sum is σ = 28614960. Its totient is φ = 3179424.

The previous prime is 11922863. The next prime is 11922881. The reversal of 11922870 is 7822911.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 397429 = 11922870 / (1 + 1 + 9 + 2 + 2 + 8 + 7 + 0).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 198685 + ... + 198744.

It is an arithmetic number, because the mean of its divisors is an integer number (1788435).

Almost surely, 2^11922870 is an apocalyptic number.

11922870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11922870 is an abundant number, since it is smaller than the sum of its proper divisors (16692090).

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

11922870 is a wasteful number, since it uses less digits than its factorization.

11922870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397439.

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 11922870 is about 3452.9509119013. The cubic root of 11922870 is about 228.4512837711.

The spelling of 11922870 in words is "eleven million, nine hundred twenty-two thousand, eight hundred seventy".