28430970 has 64 divisors (see below), whose sum is σ = 73063296. Its totient is φ = 7055360.

The previous prime is 28430959. The next prime is 28430971. The reversal of 28430970 is 7903482.

It is not an unprimeable number, because it can be changed into a prime (28430971) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54310 + ... + 54830.

It is an arithmetic number, because the mean of its divisors is an integer number (1141614).

Almost surely, 2^28430970 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28430970, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36531648).

28430970 is an abundant number, since it is smaller than the sum of its proper divisors (44632326).

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

28430970 is a wasteful number, since it uses less digits than its factorization.

28430970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 28430970 is about 5332.0699545299. The cubic root of 28430970 is about 305.2089225204.

The spelling of 28430970 in words is "twenty-eight million, four hundred thirty thousand, nine hundred seventy".