28011292090 has 16 divisors (see below), whose sum is σ = 51111016488. Its totient is φ = 11051030016.

The previous prime is 28011292069. The next prime is 28011292097. The reversal of 28011292090 is 9029211082.

It can be written as a sum of positive squares in 4 ways, for example, as 19827737721 + 8183554369 = 140811^2 + 90463^2 .

It is not an unprimeable number, because it can be changed into a prime (28011292097) 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, 19185087 + ... + 19186546.

Almost surely, 2^28011292090 is an apocalyptic number.

28011292090 is a deficient number, since it is larger than the sum of its proper divisors (23099724398).

28011292090 is a wasteful number, since it uses less digits than its factorization.

28011292090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38371713.

The product of its (nonzero) digits is 5184, while the sum is 34.

The spelling of 28011292090 in words is "twenty-eight billion, eleven million, two hundred ninety-two thousand, ninety".