28755501 has 16 divisors (see below), whose sum is σ = 40046400. Its totient is φ = 18330368.

The previous prime is 28755481. The next prime is 28755511. The reversal of 28755501 is 10555782.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 28755501 - 2⁵ = 28755469 is a prime.

It is a super-2 number, since 2×28755501² = 1653757675522002, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28755511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7765 + ... + 10853.

It is an arithmetic number, because the mean of its divisors is an integer number (2502900).

Almost surely, 2^28755501 is an apocalyptic number.

It is an amenable number.

28755501 is a deficient number, since it is larger than the sum of its proper divisors (11290899).

28755501 is a wasteful number, since it uses less digits than its factorization.

28755501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3228.

The product of its (nonzero) digits is 14000, while the sum is 33.

The square root of 28755501 is about 5362.4155937413. The cubic root of 28755501 is about 306.3658211926.

The spelling of 28755501 in words is "twenty-eight million, seven hundred fifty-five thousand, five hundred one".