28061672 has 8 divisors (see below), whose sum is σ = 52615650. Its totient is φ = 14030832.

The previous prime is 28061659. The next prime is 28061681. The reversal of 28061672 is 27616082.

It can be written as a sum of positive squares in only one way, i.e., 18783556 + 9278116 = 4334^2 + 3046^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1753847 + ... + 1753862.

Almost surely, 2^28061672 is an apocalyptic number.

It is an amenable number.

28061672 is a deficient number, since it is larger than the sum of its proper divisors (24553978).

28061672 is a wasteful number, since it uses less digits than its factorization.

28061672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3507715 (or 3507711 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 28061672 is about 5297.3268730559. The cubic root of 28061672 is about 303.8816771749.

The spelling of 28061672 in words is "twenty-eight million, sixty-one thousand, six hundred seventy-two".