28700010 has 24 divisors (see below), whose sum is σ = 74620260. Its totient is φ = 7653312.

The previous prime is 28699997. The next prime is 28700081. The reversal of 28700010 is 1000782.

It can be written as a sum of positive squares in 2 ways, for example, as 28611801 + 88209 = 5349^2 + 297^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 159355 + ... + 159534.

Almost surely, 2^28700010 is an apocalyptic number.

28700010 is an abundant number, since it is smaller than the sum of its proper divisors (45920250).

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

28700010 is a wasteful number, since it uses less digits than its factorization.

28700010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318902 (or 318899 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

The square root of 28700010 is about 5357.2390277082. The cubic root of 28700010 is about 306.1686242210.

Adding to 28700010 its reverse (1000782), we get a palindrome (29700792).

The spelling of 28700010 in words is "twenty-eight million, seven hundred thousand, ten".