11899538 has 8 divisors (see below), whose sum is σ = 20399232. Its totient is φ = 5099796.

The previous prime is 11899523. The next prime is 11899549. The reversal of 11899538 is 83599811.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×11899538² = 283198009226888, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 424970 + ... + 424997.

It is an arithmetic number, because the mean of its divisors is an integer number (2549904).

Almost surely, 2^11899538 is an apocalyptic number.

11899538 is a deficient number, since it is larger than the sum of its proper divisors (8499694).

11899538 is an equidigital number, since it uses as much as digits as its factorization.

11899538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 849976.

The product of its digits is 77760, while the sum is 44.

The square root of 11899538 is about 3449.5706979275. The cubic root of 11899538 is about 228.3021668202.

The spelling of 11899538 in words is "eleven million, eight hundred ninety-nine thousand, five hundred thirty-eight".