28969437 has 32 divisors (see below), whose sum is σ = 46080000. Its totient is φ = 16174704.

The previous prime is 28969427. The next prime is 28969453. The reversal of 28969437 is 73496982.

It is not a de Polignac number, because 28969437 - 2⁶ = 28969373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28969427) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48064 + ... + 48662.

It is an arithmetic number, because the mean of its divisors is an integer number (1440000).

Almost surely, 2^28969437 is an apocalyptic number.

It is an amenable number.

28969437 is a deficient number, since it is larger than the sum of its proper divisors (17110563).

28969437 is an equidigital number, since it uses as much as digits as its factorization.

28969437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670 (or 656 counting only the distinct ones).

The product of its digits is 653184, while the sum is 48.

The square root of 28969437 is about 5382.3263557685. The cubic root of 28969437 is about 307.1237144937.

The spelling of 28969437 in words is "twenty-eight million, nine hundred sixty-nine thousand, four hundred thirty-seven".