866450790 has 32 divisors (see below), whose sum is σ = 2310536160. Its totient is φ = 231053472.

The previous prime is 866450773. The next prime is 866450791. The reversal of 866450790 is 97054668.

866450790 is a `hidden beast` number, since 86 + 64 + 507 + 9 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866450791) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1604269 + ... + 1604808.

It is an arithmetic number, because the mean of its divisors is an integer number (72204255).

Almost surely, 2^866450790 is an apocalyptic number.

866450790 is an abundant number, since it is smaller than the sum of its proper divisors (1444085370).

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

866450790 is a wasteful number, since it uses less digits than its factorization.

866450790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3209093 (or 3209087 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 866450790 is about 29435.5361765333. The cubic root of 866450790 is about 953.3403334884.

The spelling of 866450790 in words is "eight hundred sixty-six million, four hundred fifty thousand, seven hundred ninety".