861290002 has 4 divisors (see below), whose sum is σ = 1291935006. Its totient is φ = 430645000.

The previous prime is 861289999. The next prime is 861290029. The reversal of 861290002 is 200092168.

It is a happy number.

861290002 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 852581601 + 8708401 = 29199^2 + 2951^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215322499 + ... + 215322502.

Almost surely, 2^861290002 is an apocalyptic number.

861290002 is a deficient number, since it is larger than the sum of its proper divisors (430645004).

861290002 is a wasteful number, since it uses less digits than its factorization.

861290002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430645003.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 861290002 is about 29347.7427070635. The cubic root of 861290002 is about 951.4437887687.

The spelling of 861290002 in words is "eight hundred sixty-one million, two hundred ninety thousand, two".