28777902 has 8 divisors (see below), whose sum is σ = 57555816. Its totient is φ = 9592632.

The previous prime is 28777901. The next prime is 28777919. The reversal of 28777902 is 20977782.

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

28777902 is an admirable number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28777901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2398153 + ... + 2398164.

It is an arithmetic number, because the mean of its divisors is an integer number (7194477).

Almost surely, 2^28777902 is an apocalyptic number.

28777902 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28777902 is a wasteful number, since it uses less digits than its factorization.

28777902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4796322.

The product of its (nonzero) digits is 98784, while the sum is 42.

The square root of 28777902 is about 5364.5038913212. The cubic root of 28777902 is about 306.4453551854.

The spelling of 28777902 in words is "twenty-eight million, seven hundred seventy-seven thousand, nine hundred two".