827990646 has 32 divisors (see below), whose sum is σ = 1899264768. Its totient is φ = 235729440.

The previous prime is 827990641. The next prime is 827990659. The reversal of 827990646 is 646099728.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (827990641) 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, 22945 + ... + 46716.

It is an arithmetic number, because the mean of its divisors is an integer number (59352024).

Almost surely, 2^827990646 is an apocalyptic number.

827990646 is an abundant number, since it is smaller than the sum of its proper divisors (1071274122).

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

827990646 is a wasteful number, since it uses less digits than its factorization.

827990646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69956.

The product of its (nonzero) digits is 1306368, while the sum is 51.

The square root of 827990646 is about 28774.8266024315. The cubic root of 827990646 is about 939.0206512032.

The spelling of 827990646 in words is "eight hundred twenty-seven million, nine hundred ninety thousand, six hundred forty-six".