28789977 has 8 divisors (see below), whose sum is σ = 38489440. Its totient is φ = 19141920.

The previous prime is 28789973. The next prime is 28790009. The reversal of 28789977 is 77998782.

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

It is not a de Polignac number, because 28789977 - 2² = 28789973 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28789973) 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, 11524 + ... + 13797.

It is an arithmetic number, because the mean of its divisors is an integer number (4811180).

Almost surely, 2^28789977 is an apocalyptic number.

It is an amenable number.

28789977 is a deficient number, since it is larger than the sum of its proper divisors (9699463).

28789977 is a wasteful number, since it uses less digits than its factorization.

28789977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25703.

The product of its digits is 3556224, while the sum is 57.

The square root of 28789977 is about 5365.6292268475. The cubic root of 28789977 is about 306.4882099452.

The spelling of 28789977 in words is "twenty-eight million, seven hundred eighty-nine thousand, nine hundred seventy-seven".