28940424 has 32 divisors (see below), whose sum is σ = 74118240. Its totient is φ = 9411200.

The previous prime is 28940423. The next prime is 28940437. The reversal of 28940424 is 42404982.

It is not an unprimeable number, because it can be changed into a prime (28940423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13722 + ... + 15689.

It is an arithmetic number, because the mean of its divisors is an integer number (2316195).

Almost surely, 2^28940424 is an apocalyptic number.

28940424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28940424 is an abundant number, since it is smaller than the sum of its proper divisors (45177816).

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

28940424 is a wasteful number, since it uses less digits than its factorization.

28940424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29461 (or 29457 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 28940424 is about 5379.6304705807. The cubic root of 28940424 is about 307.0211517291.

The spelling of 28940424 in words is "twenty-eight million, nine hundred forty thousand, four hundred twenty-four".