28001052 has 30 divisors (see below), whose sum is σ = 73201128. Its totient is φ = 9333576.

The previous prime is 28001047. The next prime is 28001053. The reversal of 28001052 is 25010082.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28001053) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 42888 + ... + 43535.

Almost surely, 2^28001052 is an apocalyptic number.

It is an amenable number.

28001052 is an abundant number, since it is smaller than the sum of its proper divisors (45200076).

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

28001052 is a wasteful number, since it uses less digits than its factorization.

28001052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86439 (or 86428 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 28001052 is about 5291.6020258519. The cubic root of 28001052 is about 303.6627001061.

The spelling of 28001052 in words is "twenty-eight million, one thousand, fifty-two".