28789650 has 36 divisors (see below), whose sum is σ = 77349402. Its totient is φ = 7677120.

The previous prime is 28789639. The next prime is 28789681. The reversal of 28789650 is 5698782.

It can be written as a sum of positive squares in 3 ways, for example, as 21930489 + 6859161 = 4683^2 + 2619^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 28789596 and 28789605.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 31539 + ... + 32438.

Almost surely, 2^28789650 is an apocalyptic number.

28789650 is an abundant number, since it is smaller than the sum of its proper divisors (48559752).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28789650 is a wasteful number, since it uses less digits than its factorization.

28789650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63995 (or 63987 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 28789650 is about 5365.5987550319. The cubic root of 28789650 is about 306.4870495643.

The spelling of 28789650 in words is "twenty-eight million, seven hundred eighty-nine thousand, six hundred fifty".