694435680 has 288 divisors, whose sum is σ = 2511329184. Its totient is φ = 181149696.

The previous prime is 694435661. The next prime is 694435697. The reversal of 694435680 is 86534496.

It is a tau number, because it is divible by the number of its divisors (288).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2060472 + ... + 2060808.

It is an arithmetic number, because the mean of its divisors is an integer number (8719893).

Almost surely, 2^694435680 is an apocalyptic number.

694435680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 694435680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1255664592).

694435680 is an abundant number, since it is smaller than the sum of its proper divisors (1816893504).

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

694435680 is a wasteful number, since it uses less digits than its factorization.

694435680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420 (or 400 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The square root of 694435680 is about 26352.1475405706. The cubic root of 694435680 is about 885.5450821917.

It can be divided in two parts, 6944 and 35680, that added together give a palindrome (42624).

The spelling of 694435680 in words is "six hundred ninety-four million, four hundred thirty-five thousand, six hundred eighty".