28401339 has 16 divisors (see below), whose sum is σ = 40230432. Its totient is φ = 17760768.

The previous prime is 28401313. The next prime is 28401341. The reversal of 28401339 is 93310482.

It is not a de Polignac number, because 28401339 - 2⁸ = 28401083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28401379) 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, 18277 + ... + 19769.

It is an arithmetic number, because the mean of its divisors is an integer number (2514402).

Almost surely, 2^28401339 is an apocalyptic number.

28401339 is a deficient number, since it is larger than the sum of its proper divisors (11829093).

28401339 is a wasteful number, since it uses less digits than its factorization.

28401339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1886.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 28401339 is about 5329.2906657453. The cubic root of 28401339 is about 305.1028552144.

The spelling of 28401339 in words is "twenty-eight million, four hundred one thousand, three hundred thirty-nine".