28972534 has 8 divisors (see below), whose sum is σ = 43483248. Its totient is φ = 14478120.

The previous prime is 28972523. The next prime is 28972547. The reversal of 28972534 is 43527982.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2479 + ... + 8005.

It is an arithmetic number, because the mean of its divisors is an integer number (5435406).

Almost surely, 2^28972534 is an apocalyptic number.

28972534 is a deficient number, since it is larger than the sum of its proper divisors (14510714).

28972534 is a wasteful number, since it uses less digits than its factorization.

28972534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8150.

The product of its digits is 120960, while the sum is 40.

The square root of 28972534 is about 5382.6140489543. The cubic root of 28972534 is about 307.1346585362.

The spelling of 28972534 in words is "twenty-eight million, nine hundred seventy-two thousand, five hundred thirty-four".