28870247090 has 16 divisors (see below), whose sum is σ = 51981839640. Its totient is φ = 11544677760.

The previous prime is 28870247033. The next prime is 28870247099. The reversal of 28870247090 is 9074207882.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 28761107281 + 109139809 = 169591^2 + 10447^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28870247099) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 392051 + ... + 459830.

Almost surely, 2^28870247090 is an apocalyptic number.

28870247090 is a deficient number, since it is larger than the sum of its proper divisors (23111592550).

28870247090 is a wasteful number, since it uses less digits than its factorization.

28870247090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855277.

The product of its (nonzero) digits is 451584, while the sum is 47.

The spelling of 28870247090 in words is "twenty-eight billion, eight hundred seventy million, two hundred forty-seven thousand, ninety".