28038045 has 48 divisors (see below), whose sum is σ = 53647488. Its totient is φ = 12458880.

The previous prime is 28038029. The next prime is 28038067. The reversal of 28038045 is 54083082.

It is not a de Polignac number, because 28038045 - 2⁴ = 28038029 is a prime.

It is a super-2 number, since 2×28038045² = 1572263934844050, which contains 22 as substring.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 26680 + ... + 27710.

It is an arithmetic number, because the mean of its divisors is an integer number (1117656).

Almost surely, 2^28038045 is an apocalyptic number.

It is an amenable number.

28038045 is a deficient number, since it is larger than the sum of its proper divisors (25609443).

28038045 is a wasteful number, since it uses less digits than its factorization.

28038045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1090 (or 1083 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 28038045 is about 5295.0963164045. The cubic root of 28038045 is about 303.7963671194.

The spelling of 28038045 in words is "twenty-eight million, thirty-eight thousand, forty-five".