28945330 has 8 divisors (see below), whose sum is σ = 52101612. Its totient is φ = 11578128.

The previous prime is 28945327. The next prime is 28945331. The reversal of 28945330 is 3354982.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 23824161 + 5121169 = 4881^2 + 2263^2 .

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

It is not an unprimeable number, because it can be changed into a prime (28945331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1447257 + ... + 1447276.

Almost surely, 2^28945330 is an apocalyptic number.

28945330 is a deficient number, since it is larger than the sum of its proper divisors (23156282).

28945330 is a wasteful number, since it uses less digits than its factorization.

28945330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2894540.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 28945330 is about 5380.0864305325. The cubic root of 28945330 is about 307.0384995590.

The spelling of 28945330 in words is "twenty-eight million, nine hundred forty-five thousand, three hundred thirty".