11897828 has 12 divisors (see below), whose sum is σ = 20845440. Its totient is φ = 5941992.

The previous prime is 11897827. The next prime is 11897833. The reversal of 11897828 is 82879811.

It is a super-2 number, since 2×11897828² = 283116622235168, which contains 22 as substring.

It is a hoax number, since the sum of its digits (44) 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 (11897827) 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 3 ways as a sum of consecutive naturals, for example, 5393 + ... + 7271.

It is an arithmetic number, because the mean of its divisors is an integer number (1737120).

Almost surely, 2^11897828 is an apocalyptic number.

It is an amenable number.

11897828 is a deficient number, since it is larger than the sum of its proper divisors (8947612).

11897828 is a wasteful number, since it uses less digits than its factorization.

11897828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3466 (or 3464 counting only the distinct ones).

The product of its digits is 64512, while the sum is 44.

The square root of 11897828 is about 3449.3228320933. The cubic root of 11897828 is about 228.2912303898.

The spelling of 11897828 in words is "eleven million, eight hundred ninety-seven thousand, eight hundred twenty-eight".