28626242 has 4 divisors (see below), whose sum is σ = 42939366. Its totient is φ = 14313120.

The previous prime is 28626239. The next prime is 28626253. The reversal of 28626242 is 24262682.

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., 19439281 + 9186961 = 4409^2 + 3031^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28626199 and 28626208.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7156559 + ... + 7156562.

Almost surely, 2^28626242 is an apocalyptic number.

28626242 is a deficient number, since it is larger than the sum of its proper divisors (14313124).

28626242 is a wasteful number, since it uses less digits than its factorization.

28626242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14313123.

The product of its digits is 18432, while the sum is 32.

The square root of 28626242 is about 5350.3497081967. The cubic root of 28626242 is about 305.9060827875.

The spelling of 28626242 in words is "twenty-eight million, six hundred twenty-six thousand, two hundred forty-two".