28661194 has 4 divisors (see below), whose sum is σ = 42991794. Its totient is φ = 14330596.

The previous prime is 28661189. The next prime is 28661219. The reversal of 28661194 is 49116682.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49116682 = 2 ⋅24558341.

It can be written as a sum of positive squares in only one way, i.e., 25553025 + 3108169 = 5055^2 + 1763^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7165297 + ... + 7165300.

Almost surely, 2^28661194 is an apocalyptic number.

28661194 is a deficient number, since it is larger than the sum of its proper divisors (14330600).

28661194 is a wasteful number, since it uses less digits than its factorization.

28661194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14330599.

The product of its digits is 20736, while the sum is 37.

The square root of 28661194 is about 5353.6150403256. The cubic root of 28661194 is about 306.0305336413.

The spelling of 28661194 in words is "twenty-eight million, six hundred sixty-one thousand, one hundred ninety-four".