28756894 has 16 divisors (see below), whose sum is σ = 45855936. Its totient is φ = 13478400.

The previous prime is 28756873. The next prime is 28756909. The reversal of 28756894 is 49865782.

28756894 = T₄₃₇₇ + T₄₃₇₈ + T₄₃₇₉.

It is a super-4 number, since 4×28756894⁴ (a number of 31 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7654 + ... + 10774.

It is an arithmetic number, because the mean of its divisors is an integer number (2865996).

Almost surely, 2^28756894 is an apocalyptic number.

28756894 is the 4379-th centered triangular number.

28756894 is a deficient number, since it is larger than the sum of its proper divisors (17099042).

28756894 is a wasteful number, since it uses less digits than its factorization.

28756894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3411.

The product of its digits is 967680, while the sum is 49.

The square root of 28756894 is about 5362.5454776626. The cubic root of 28756894 is about 306.3707681961.

The spelling of 28756894 in words is "twenty-eight million, seven hundred fifty-six thousand, eight hundred ninety-four".