12897828 has 18 divisors (see below), whose sum is σ = 32602934. Its totient is φ = 4299264.

The previous prime is 12897817. The next prime is 12897839. The reversal of 12897828 is 82879821.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12897817) and next prime (12897839).

It can be written as a sum of positive squares in only one way, i.e., 8538084 + 4359744 = 2922^2 + 2088^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 179101 + ... + 179172.

Almost surely, 2^12897828 is an apocalyptic number.

12897828 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12897828 is an abundant number, since it is smaller than the sum of its proper divisors (19705106).

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

12897828 is a wasteful number, since it uses less digits than its factorization.

12897828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358283 (or 358278 counting only the distinct ones).

The product of its digits is 129024, while the sum is 45.

The square root of 12897828 is about 3591.3546190818. The cubic root of 12897828 is about 234.5158464354.

The spelling of 12897828 in words is "twelve million, eight hundred ninety-seven thousand, eight hundred twenty-eight".