11871738 has 16 divisors (see below), whose sum is σ = 26381760. Its totient is φ = 3957228.

The previous prime is 11871737. The next prime is 11871767. The reversal of 11871738 is 83717811.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (11871731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109870 + ... + 109977.

It is an arithmetic number, because the mean of its divisors is an integer number (1648860).

Almost surely, 2^11871738 is an apocalyptic number.

11871738 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

11871738 is an abundant number, since it is smaller than the sum of its proper divisors (14510022).

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

11871738 is a wasteful number, since it uses less digits than its factorization.

11871738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219858 (or 219852 counting only the distinct ones).

The product of its digits is 9408, while the sum is 36.

The square root of 11871738 is about 3445.5388548092. The cubic root of 11871738 is about 228.1242397673.

The spelling of 11871738 in words is "eleven million, eight hundred seventy-one thousand, seven hundred thirty-eight".