28297502 has 4 divisors (see below), whose sum is σ = 42446256. Its totient is φ = 14148750.

The previous prime is 28297463. The next prime is 28297559. The reversal of 28297502 is 20579282.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7074374 + ... + 7074377.

It is an arithmetic number, because the mean of its divisors is an integer number (10611564).

Almost surely, 2^28297502 is an apocalyptic number.

28297502 is a deficient number, since it is larger than the sum of its proper divisors (14148754).

28297502 is a wasteful number, since it uses less digits than its factorization.

28297502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14148753.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 28297502 is about 5319.5396417359. The cubic root of 28297502 is about 304.7305763703.

The spelling of 28297502 in words is "twenty-eight million, two hundred ninety-seven thousand, five hundred two".