28396377 has 6 divisors (see below), whose sum is σ = 41017002. Its totient is φ = 18930912.

The previous prime is 28396369. The next prime is 28396387. The reversal of 28396377 is 77369382.

It is a happy number.

28396377 is a `hidden beast` number, since 2 + 8 + 3 + 9 + 637 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 25644096 + 2752281 = 5064^2 + 1659^2 .

It is not a de Polignac number, because 28396377 - 2³ = 28396369 is a prime.

It is a super-2 number, since 2×28396377² = 1612708453452258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28396327) 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 5 ways as a sum of consecutive naturals, for example, 1577568 + ... + 1577585.

It is an arithmetic number, because the mean of its divisors is an integer number (6836167).

Almost surely, 2^28396377 is an apocalyptic number.

It is an amenable number.

28396377 is a deficient number, since it is larger than the sum of its proper divisors (12620625).

28396377 is a wasteful number, since it uses less digits than its factorization.

28396377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3155159 (or 3155156 counting only the distinct ones).

The product of its digits is 381024, while the sum is 45.

The square root of 28396377 is about 5328.8251050302. The cubic root of 28396377 is about 305.0850859988.

It can be divided in two parts, 2839 and 6377, that added together give a square (9216 = 96²).

The spelling of 28396377 in words is "twenty-eight million, three hundred ninety-six thousand, three hundred seventy-seven".