11891470 has 16 divisors (see below), whose sum is σ = 21860928. Its totient is φ = 4655200.

The previous prime is 11891461. The next prime is 11891471. The reversal of 11891470 is 7419811.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11891471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12181 + ... + 13120.

It is an arithmetic number, because the mean of its divisors is an integer number (1366308).

Almost surely, 2^11891470 is an apocalyptic number.

11891470 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11891470 is a deficient number, since it is larger than the sum of its proper divisors (9969458).

11891470 is a wasteful number, since it uses less digits than its factorization.

11891470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25355.

The product of its (nonzero) digits is 2016, while the sum is 31.

The square root of 11891470 is about 3448.4010787610. The cubic root of 11891470 is about 228.2505581408.

The spelling of 11891470 in words is "eleven million, eight hundred ninety-one thousand, four hundred seventy".