28733430 has 32 divisors (see below), whose sum is σ = 75230208. Its totient is φ = 6965600.

The previous prime is 28733429. The next prime is 28733443. The reversal of 28733430 is 3433782.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43206 + ... + 43865.

It is an arithmetic number, because the mean of its divisors is an integer number (2350944).

Almost surely, 2^28733430 is an apocalyptic number.

28733430 is an abundant number, since it is smaller than the sum of its proper divisors (46496778).

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

28733430 is a wasteful number, since it uses less digits than its factorization.

28733430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87092.

The product of its (nonzero) digits is 12096, while the sum is 30.

The square root of 28733430 is about 5360.3572642129. The cubic root of 28733430 is about 306.2874184461.

The spelling of 28733430 in words is "twenty-eight million, seven hundred thirty-three thousand, four hundred thirty".