28401235 has 8 divisors (see below), whose sum is σ = 34464960. Its totient is φ = 22465344.

The previous prime is 28401229. The next prime is 28401259. The reversal of 28401235 is 53210482.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28401235 - 2³ = 28401227 is a prime.

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, 31467 + ... + 32356.

It is an arithmetic number, because the mean of its divisors is an integer number (4308120).

Almost surely, 2^28401235 is an apocalyptic number.

28401235 is a deficient number, since it is larger than the sum of its proper divisors (6063725).

28401235 is an equidigital number, since it uses as much as digits as its factorization.

28401235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63917.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 28401235 is about 5329.2809083403. The cubic root of 28401235 is about 305.1024828054.

The spelling of 28401235 in words is "twenty-eight million, four hundred one thousand, two hundred thirty-five".