28002051 has 32 divisors (see below), whose sum is σ = 51724800. Its totient is φ = 14545440.

The previous prime is 28002041. The next prime is 28002071. The reversal of 28002051 is 15020082.

It is not a de Polignac number, because 28002051 - 2⁵ = 28002019 is a prime.

It is a super-2 number, since 2×28002051² = 1568229720413202, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28002041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4656 + ... + 8813.

It is an arithmetic number, because the mean of its divisors is an integer number (1616400).

Almost surely, 2^28002051 is an apocalyptic number.

28002051 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

28002051 is a deficient number, since it is larger than the sum of its proper divisors (23722749).

28002051 is a wasteful number, since it uses less digits than its factorization.

28002051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13496 (or 13490 counting only the distinct ones).

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

The square root of 28002051 is about 5291.6964198639. The cubic root of 28002051 is about 303.6663113446. Note that the first 3 decimals are identical.

It can be divided in two parts, 2800 and 2051, that added together give a triangular number (4851 = T₉₈).

The spelling of 28002051 in words is "twenty-eight million, two thousand, fifty-one".