28972234 has 4 divisors (see below), whose sum is σ = 43458354. Its totient is φ = 14486116.

The previous prime is 28972231. The next prime is 28972253. The reversal of 28972234 is 43227982.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 26491609 + 2480625 = 5147^2 + 1575^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28972193 and 28972202.

It is not an unprimeable number, because it can be changed into a prime (28972231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7243057 + ... + 7243060.

Almost surely, 2^28972234 is an apocalyptic number.

28972234 is a deficient number, since it is larger than the sum of its proper divisors (14486120).

28972234 is a wasteful number, since it uses less digits than its factorization.

28972234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14486119.

The product of its digits is 48384, while the sum is 37.

The square root of 28972234 is about 5382.5861813816. The cubic root of 28972234 is about 307.1335984435.

The spelling of 28972234 in words is "twenty-eight million, nine hundred seventy-two thousand, two hundred thirty-four".