28776077 has 4 divisors (see below), whose sum is σ = 31392096. Its totient is φ = 26160060.

The previous prime is 28776043. The next prime is 28776101. The reversal of 28776077 is 77067782.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28776077 - 2⁸ = 28775821 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 (28776977) 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, 1307993 + ... + 1308014.

It is an arithmetic number, because the mean of its divisors is an integer number (7848024).

Almost surely, 2^28776077 is an apocalyptic number.

It is an amenable number.

28776077 is a deficient number, since it is larger than the sum of its proper divisors (2616019).

28776077 is a wasteful number, since it uses less digits than its factorization.

28776077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2616018.

The product of its (nonzero) digits is 230496, while the sum is 44.

The square root of 28776077 is about 5364.3337890180. Note that the first 3 decimals coincide. The cubic root of 28776077 is about 306.4388771292.

The spelling of 28776077 in words is "twenty-eight million, seven hundred seventy-six thousand, seventy-seven".