28939757 has 8 divisors (see below), whose sum is σ = 36080832. Its totient is φ = 22550400.

The previous prime is 28939753. The next prime is 28939759. The reversal of 28939757 is 75793982.

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 28939757 - 2² = 28939753 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28939753) 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, 187844 + ... + 187997.

It is an arithmetic number, because the mean of its divisors is an integer number (4510104).

Almost surely, 2^28939757 is an apocalyptic number.

It is an amenable number.

28939757 is a deficient number, since it is larger than the sum of its proper divisors (7141075).

28939757 is a wasteful number, since it uses less digits than its factorization.

28939757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375859.

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

The square root of 28939757 is about 5379.5684771178. The cubic root of 28939757 is about 307.0187930366.

It can be divided in two parts, 2893975 and 7, that added together give a palindrome (2893982).

The spelling of 28939757 in words is "twenty-eight million, nine hundred thirty-nine thousand, seven hundred fifty-seven".