694132640 has 144 divisors (see below), whose sum is σ = 1755885600. Its totient is φ = 259201536.

The previous prime is 694132609. The next prime is 694132657. The reversal of 694132640 is 46231496.

It is a self number, because there is not a number n which added to its sum of digits gives 694132640.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4993691 + ... + 4993829.

It is an arithmetic number, because the mean of its divisors is an integer number (12193650).

Almost surely, 2^694132640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 694132640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (877942800).

694132640 is an abundant number, since it is smaller than the sum of its proper divisors (1061752960).

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

694132640 is a wasteful number, since it uses less digits than its factorization.

694132640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259 (or 228 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 694132640 is about 26346.3970971365. The cubic root of 694132640 is about 885.4162511451.

The spelling of 694132640 in words is "six hundred ninety-four million, one hundred thirty-two thousand, six hundred forty".