28977185 has 8 divisors (see below), whose sum is σ = 36602880. Its totient is φ = 21961584.

The previous prime is 28977181. The next prime is 28977187. The reversal of 28977185 is 58177982.

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

It is a cyclic number.

It is not a de Polignac number, because 28977185 - 2² = 28977181 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28977181) 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, 152417 + ... + 152606.

It is an arithmetic number, because the mean of its divisors is an integer number (4575360).

Almost surely, 2^28977185 is an apocalyptic number.

It is an amenable number.

28977185 is a deficient number, since it is larger than the sum of its proper divisors (7625695).

28977185 is a wasteful number, since it uses less digits than its factorization.

28977185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305047.

The product of its digits is 282240, while the sum is 47.

The square root of 28977185 is about 5383.0460707670. The cubic root of 28977185 is about 307.1510925707.

The spelling of 28977185 in words is "twenty-eight million, nine hundred seventy-seven thousand, one hundred eighty-five".