28977539 has 8 divisors (see below), whose sum is σ = 30297120. Its totient is φ = 27662976.

The previous prime is 28977491. The next prime is 28977547. The reversal of 28977539 is 93577982.

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 28977539 - 2²⁴ = 12200323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28977589) 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, 15419 + ... + 17195.

It is an arithmetic number, because the mean of its divisors is an integer number (3787140).

Almost surely, 2^28977539 is an apocalyptic number.

28977539 is a deficient number, since it is larger than the sum of its proper divisors (1319581).

28977539 is a wasteful number, since it uses less digits than its factorization.

28977539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2509.

The product of its digits is 952560, while the sum is 50.

The square root of 28977539 is about 5383.0789516781. The cubic root of 28977539 is about 307.1523433368.

The spelling of 28977539 in words is "twenty-eight million, nine hundred seventy-seven thousand, five hundred thirty-nine".