28748877 has 8 divisors (see below), whose sum is σ = 38361216. Its totient is φ = 19151232.

The previous prime is 28748861. The next prime is 28748879. The reversal of 28748877 is 77884782.

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

It is not a de Polignac number, because 28748877 - 2⁴ = 28748861 is a prime.

It is a super-2 number, since 2×28748877² = 1652995857522258, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28748879) 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, 2268 + ... + 7914.

It is an arithmetic number, because the mean of its divisors is an integer number (4795152).

Almost surely, 2^28748877 is an apocalyptic number.

It is an amenable number.

28748877 is a deficient number, since it is larger than the sum of its proper divisors (9612339).

28748877 is a wasteful number, since it uses less digits than its factorization.

28748877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7347.

The product of its digits is 1404928, while the sum is 51.

The square root of 28748877 is about 5361.7979260692. The cubic root of 28748877 is about 306.3422949921.

The spelling of 28748877 in words is "twenty-eight million, seven hundred forty-eight thousand, eight hundred seventy-seven".