28297534 has 8 divisors (see below), whose sum is σ = 43142328. Its totient is φ = 13916760.

The previous prime is 28297463. The next prime is 28297559. The reversal of 28297534 is 43579282.

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, 115852 + ... + 116095.

It is an arithmetic number, because the mean of its divisors is an integer number (5392791).

Almost surely, 2^28297534 is an apocalyptic number.

28297534 is a deficient number, since it is larger than the sum of its proper divisors (14844794).

28297534 is a wasteful number, since it uses less digits than its factorization.

28297534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232010.

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

The square root of 28297534 is about 5319.5426495141. The cubic root of 28297534 is about 304.7306912376.

The spelling of 28297534 in words is "twenty-eight million, two hundred ninety-seven thousand, five hundred thirty-four".