28401024 has 32 divisors (see below), whose sum is σ = 75441240. Its totient is φ = 9466880.

The previous prime is 28401017. The next prime is 28401041. The reversal of 28401024 is 42010482.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 36597 + ... + 37364.

Almost surely, 2^28401024 is an apocalyptic number.

28401024 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28401024 is an abundant number, since it is smaller than the sum of its proper divisors (47040216).

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

28401024 is an equidigital number, since it uses as much as digits as its factorization.

28401024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73978 (or 73966 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 28401024 is about 5329.2611120117. The cubic root of 28401024 is about 305.1017272423.

The spelling of 28401024 in words is "twenty-eight million, four hundred one thousand, twenty-four".