28170946 has 4 divisors (see below), whose sum is σ = 42256422. Its totient is φ = 14085472.

The previous prime is 28170937. The next prime is 28170953. The reversal of 28170946 is 64907182.

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., 17313921 + 10857025 = 4161^2 + 3295^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7042735 + ... + 7042738.

Almost surely, 2^28170946 is an apocalyptic number.

28170946 is a deficient number, since it is larger than the sum of its proper divisors (14085476).

28170946 is a wasteful number, since it uses less digits than its factorization.

28170946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14085475.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 28170946 is about 5307.6309216071. The cubic root of 28170946 is about 304.2756113734.

The spelling of 28170946 in words is "twenty-eight million, one hundred seventy thousand, nine hundred forty-six".