28707090 has 16 divisors (see below), whose sum is σ = 68897088. Its totient is φ = 7655216.

The previous prime is 28707089. The next prime is 28707097. The reversal of 28707090 is 9070782.

It is not an unprimeable number, because it can be changed into a prime (28707097) 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, 478422 + ... + 478481.

It is an arithmetic number, because the mean of its divisors is an integer number (4306068).

Almost surely, 2^28707090 is an apocalyptic number.

28707090 is an abundant number, since it is smaller than the sum of its proper divisors (40189998).

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

28707090 is a wasteful number, since it uses less digits than its factorization.

28707090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 956913.

The product of its (nonzero) digits is 7056, while the sum is 33.

The square root of 28707090 is about 5357.8997750984. The cubic root of 28707090 is about 306.1937983776.

The spelling of 28707090 in words is "twenty-eight million, seven hundred seven thousand, ninety".