28522742 has 4 divisors (see below), whose sum is σ = 42784116. Its totient is φ = 14261370.

The previous prime is 28522733. The next prime is 28522789. The reversal of 28522742 is 24722582.

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

It is a super-2 number, since 2×28522742² = 1627093622397128, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28522699 and 28522708.

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, 7130684 + ... + 7130687.

It is an arithmetic number, because the mean of its divisors is an integer number (10696029).

Almost surely, 2^28522742 is an apocalyptic number.

28522742 is a deficient number, since it is larger than the sum of its proper divisors (14261374).

28522742 is a wasteful number, since it uses less digits than its factorization.

28522742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14261373.

The product of its digits is 17920, while the sum is 32.

The square root of 28522742 is about 5340.6686847248. The cubic root of 28522742 is about 305.5369632666.

The spelling of 28522742 in words is "twenty-eight million, five hundred twenty-two thousand, seven hundred forty-two".