28127628 has 24 divisors (see below), whose sum is σ = 72923760. Its totient is φ = 9375840.

The previous prime is 28127611. The next prime is 28127641. The reversal of 28127628 is 82672182.

It is a happy number.

28127628 is a `hidden beast` number, since 2 + 8 + 1 + 27 + 628 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 28127592 and 28127601.

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, 130113 + ... + 130328.

It is an arithmetic number, because the mean of its divisors is an integer number (3038490).

Almost surely, 2^28127628 is an apocalyptic number.

It is an amenable number.

28127628 is an abundant number, since it is smaller than the sum of its proper divisors (44796132).

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

28127628 is a wasteful number, since it uses less digits than its factorization.

28127628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260454 (or 260446 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 28127628 is about 5303.5486233276. The cubic root of 28127628 is about 304.1195714996.

It can be divided in two parts, 2812 and 7628, that added together give a triangular number (10440 = T₁₄₄).

The spelling of 28127628 in words is "twenty-eight million, one hundred twenty-seven thousand, six hundred twenty-eight".