28938369 has 16 divisors (see below), whose sum is σ = 40963968. Its totient is φ = 18108672.

The previous prime is 28938313. The next prime is 28938383. The reversal of 28938369 is 96383982.

It is not a de Polignac number, because 28938369 - 2⁷ = 28938241 is a prime.

It is a super-2 number, since 2×28938369² = 1674858400760322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28938769) 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, 32559 + ... + 33435.

It is an arithmetic number, because the mean of its divisors is an integer number (2560248).

Almost surely, 2^28938369 is an apocalyptic number.

It is an amenable number.

28938369 is a deficient number, since it is larger than the sum of its proper divisors (12025599).

28938369 is a wasteful number, since it uses less digits than its factorization.

28938369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1544.

The product of its digits is 559872, while the sum is 48.

The square root of 28938369 is about 5379.4394689410. The cubic root of 28938369 is about 307.0138845768.

The spelling of 28938369 in words is "twenty-eight million, nine hundred thirty-eight thousand, three hundred sixty-nine".