28762239 has 16 divisors (see below), whose sum is σ = 42344064. Its totient is φ = 17220000.

The previous prime is 28762231. The next prime is 28762277. The reversal of 28762239 is 93226782.

It is not a de Polignac number, because 28762239 - 2³ = 28762231 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28762197 and 28762206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28762231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2512 + ... + 7989.

It is an arithmetic number, because the mean of its divisors is an integer number (2646504).

Almost surely, 2^28762239 is an apocalyptic number.

28762239 is a deficient number, since it is larger than the sum of its proper divisors (13581825).

28762239 is a wasteful number, since it uses less digits than its factorization.

28762239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10598.

The product of its digits is 72576, while the sum is 39.

The square root of 28762239 is about 5363.0438185791. The cubic root of 28762239 is about 306.3897485759.

It can be divided in two parts, 287622 and 39, that added together give a triangular number (287661 = T₇₅₈).

The spelling of 28762239 in words is "twenty-eight million, seven hundred sixty-two thousand, two hundred thirty-nine".