28969428 has 24 divisors (see below), whose sum is σ = 71572032. Its totient is φ = 9088384.

The previous prime is 28969427. The next prime is 28969453. The reversal of 28969428 is 82496982.

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 7 ways as a sum of consecutive naturals, for example, 70800 + ... + 71207.

It is an arithmetic number, because the mean of its divisors is an integer number (2982168).

Almost surely, 2^28969428 is an apocalyptic number.

It is an amenable number.

28969428 is an abundant number, since it is smaller than the sum of its proper divisors (42602604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28969428 is a wasteful number, since it uses less digits than its factorization.

28969428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142031 (or 142029 counting only the distinct ones).

The product of its digits is 497664, while the sum is 48.

The square root of 28969428 is about 5382.3255196987. The cubic root of 28969428 is about 307.1236826887.

The spelling of 28969428 in words is "twenty-eight million, nine hundred sixty-nine thousand, four hundred twenty-eight".