87009290 has 16 divisors (see below), whose sum is σ = 156731112. Its totient is φ = 34778304.

The previous prime is 87009289. The next prime is 87009323. The reversal of 87009290 is 9290078.

It can be written as a sum of positive squares in 4 ways, for example, as 73839649 + 13169641 = 8593^2 + 3629^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 87009290.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17792 + ... + 22148.

Almost surely, 2^87009290 is an apocalyptic number.

87009290 is a deficient number, since it is larger than the sum of its proper divisors (69721822).

87009290 is a wasteful number, since it uses less digits than its factorization.

87009290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6361.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 87009290 is about 9327.8770360677. The cubic root of 87009290 is about 443.1205334212.

The spelling of 87009290 in words is "eighty-seven million, nine thousand, two hundred ninety".