28973650 has 12 divisors (see below), whose sum is σ = 53891082. Its totient is φ = 11589440.

The previous prime is 28973621. The next prime is 28973657. The reversal of 28973650 is 5637982.

It can be written as a sum of positive squares in 3 ways, for example, as 21427641 + 7546009 = 4629^2 + 2747^2 .

It is not an unprimeable number, because it can be changed into a prime (28973657) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 289687 + ... + 289786.

Almost surely, 2^28973650 is an apocalyptic number.

28973650 is a deficient number, since it is larger than the sum of its proper divisors (24917432).

28973650 is a wasteful number, since it uses less digits than its factorization.

28973650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579485 (or 579480 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 28973650 is about 5382.7177150581. The cubic root of 28973650 is about 307.1386020168.

The spelling of 28973650 in words is "twenty-eight million, nine hundred seventy-three thousand, six hundred fifty".