28977169 has 8 divisors (see below), whose sum is σ = 31248000. Its totient is φ = 26712336.

The previous prime is 28977161. The next prime is 28977181. The reversal of 28977169 is 96177982.

It is a happy number.

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 28977169 - 2³ = 28977161 is a prime.

It is a super-2 number, since 2×28977169² = 1679352646509122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28977161) 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, 18582 + ... + 20080.

It is an arithmetic number, because the mean of its divisors is an integer number (3906000).

Almost surely, 2^28977169 is an apocalyptic number.

It is an amenable number.

28977169 is a deficient number, since it is larger than the sum of its proper divisors (2270831).

28977169 is a wasteful number, since it uses less digits than its factorization.

28977169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2999.

The product of its digits is 381024, while the sum is 49.

The square root of 28977169 is about 5383.0445846194. The cubic root of 28977169 is about 307.1510360386.

The spelling of 28977169 in words is "twenty-eight million, nine hundred seventy-seven thousand, one hundred sixty-nine".