28977367 has 4 divisors (see below), whose sum is σ = 30681936. Its totient is φ = 27272800.

The previous prime is 28977359. The next prime is 28977373. The reversal of 28977367 is 76377982.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28977367 - 2³ = 28977359 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28977367.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28977307) 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, 852259 + ... + 852292.

It is an arithmetic number, because the mean of its divisors is an integer number (7670484).

Almost surely, 2^28977367 is an apocalyptic number.

28977367 is a deficient number, since it is larger than the sum of its proper divisors (1704569).

28977367 is a wasteful number, since it uses less digits than its factorization.

28977367 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1704568.

The product of its digits is 889056, while the sum is 49.

The square root of 28977367 is about 5383.0629756673. The cubic root of 28977367 is about 307.1517356212.

The spelling of 28977367 in words is "twenty-eight million, nine hundred seventy-seven thousand, three hundred sixty-seven".