28877501 has 8 divisors (see below), whose sum is σ = 29739864. Its totient is φ = 28019520.

The previous prime is 28877477. The next prime is 28877507. The reversal of 28877501 is 10577882.

It can be written as a sum of positive squares in 4 ways, for example, as 5885476 + 22992025 = 2426^2 + 4795^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28877501 - 2¹⁴ = 28861117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28877507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16211 + ... + 17903.

It is an arithmetic number, because the mean of its divisors is an integer number (3717483).

Almost surely, 2^28877501 is an apocalyptic number.

It is an amenable number.

28877501 is a deficient number, since it is larger than the sum of its proper divisors (862363).

28877501 is a wasteful number, since it uses less digits than its factorization.

28877501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2191.

The product of its (nonzero) digits is 31360, while the sum is 38.

The square root of 28877501 is about 5373.7790241133. The cubic root of 28877501 is about 306.7984792263.

The spelling of 28877501 in words is "twenty-eight million, eight hundred seventy-seven thousand, five hundred one".