28277613 has 64 divisors (see below), whose sum is σ = 54673920. Its totient is φ = 14017536.

The previous prime is 28277591. The next prime is 28277653. The reversal of 28277613 is 31677282.

It is not a de Polignac number, because 28277613 - 2⁸ = 28277357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28277653) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 41431 + ... + 42107.

It is an arithmetic number, because the mean of its divisors is an integer number (854280).

Almost surely, 2^28277613 is an apocalyptic number.

It is an amenable number.

28277613 is a deficient number, since it is larger than the sum of its proper divisors (26396307).

28277613 is a wasteful number, since it uses less digits than its factorization.

28277613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723 (or 717 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 28277613 is about 5317.6698844513. The cubic root of 28277613 is about 304.6591659806.

It can be divided in two parts, 2827 and 7613, that added together give a triangular number (10440 = T₁₄₄).

The spelling of 28277613 in words is "twenty-eight million, two hundred seventy-seven thousand, six hundred thirteen".