28011877 has 4 divisors (see below), whose sum is σ = 28663360. Its totient is φ = 27360396.

The previous prime is 28011857. The next prime is 28011901. The reversal of 28011877 is 77811082.

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 28011877 - 2²³ = 19623269 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 (28011847) 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, 325677 + ... + 325762.

It is an arithmetic number, because the mean of its divisors is an integer number (7165840).

Almost surely, 2^28011877 is an apocalyptic number.

It is an amenable number.

28011877 is a deficient number, since it is larger than the sum of its proper divisors (651483).

28011877 is an equidigital number, since it uses as much as digits as its factorization.

28011877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 651482.

The product of its (nonzero) digits is 6272, while the sum is 34.

The square root of 28011877 is about 5292.6247741551. The cubic root of 28011877 is about 303.7018263173.

The spelling of 28011877 in words is "twenty-eight million, eleven thousand, eight hundred seventy-seven".