694945820 has 24 divisors (see below), whose sum is σ = 1475787600. Its totient is φ = 274854272.

The previous prime is 694945813. The next prime is 694945831. The reversal of 694945820 is 28549496.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193430 + ... + 196989.

It is an arithmetic number, because the mean of its divisors is an integer number (61491150).

Almost surely, 2^694945820 is an apocalyptic number.

It is an amenable number.

694945820 is an abundant number, since it is smaller than the sum of its proper divisors (780841780).

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

694945820 is a wasteful number, since it uses less digits than its factorization.

694945820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390517 (or 390515 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 47.

The square root of 694945820 is about 26361.8250506296. The cubic root of 694945820 is about 885.7618727963.

The spelling of 694945820 in words is "six hundred ninety-four million, nine hundred forty-five thousand, eight hundred twenty".