28994424 has 32 divisors (see below), whose sum is σ = 74826240. Its totient is φ = 9352800.

The previous prime is 28994417. The next prime is 28994431. The reversal of 28994424 is 42449982.

It is an interprime number because it is at equal distance from previous prime (28994417) and next prime (28994431).

It is a nialpdrome in base 12.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18742 + ... + 20229.

It is an arithmetic number, because the mean of its divisors is an integer number (2338320).

Almost surely, 2^28994424 is an apocalyptic number.

28994424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28994424 is an abundant number, since it is smaller than the sum of its proper divisors (45831816).

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

28994424 is a wasteful number, since it uses less digits than its factorization.

28994424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39011 (or 39007 counting only the distinct ones).

The product of its digits is 165888, while the sum is 42.

The square root of 28994424 is about 5384.6470636431. The cubic root of 28994424 is about 307.2119902275.

The spelling of 28994424 in words is "twenty-eight million, nine hundred ninety-four thousand, four hundred twenty-four".