28233430 has 32 divisors (see below), whose sum is σ = 56648160. Its totient is φ = 10068480.

The previous prime is 28233421. The next prime is 28233437. The reversal of 28233430 is 3433282.

It is a junction number, because it is equal to n+sod(n) for n = 28233395 and 28233404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28233437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1141 + ... + 7600.

It is an arithmetic number, because the mean of its divisors is an integer number (1770255).

Almost surely, 2^28233430 is an apocalyptic number.

28233430 is an abundant number, since it is smaller than the sum of its proper divisors (28414730).

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

28233430 is a wasteful number, since it uses less digits than its factorization.

28233430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8784.

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 28233430 is about 5313.5139032471. The cubic root of 28233430 is about 304.5004093850.

The spelling of 28233430 in words is "twenty-eight million, two hundred thirty-three thousand, four hundred thirty".