694643040 has 960 divisors, whose sum is σ = 3278499840. Its totient is φ = 134369280.

The previous prime is 694643039. The next prime is 694643041. The reversal of 694643040 is 40346496.

694643040 is a `hidden beast` number, since 6 + 9 + 4 + 643 + 0 + 4 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (694643039) and next prime (694643041).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 694642986 and 694643004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (694643041) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 22407825 + ... + 22407855.

It is an arithmetic number, because the mean of its divisors is an integer number (3415104).

Almost surely, 2^694643040 is an apocalyptic number.

694643040 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 694643040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1639249920).

694643040 is an abundant number, since it is smaller than the sum of its proper divisors (2583856800).

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

694643040 is a wasteful number, since it uses less digits than its factorization.

694643040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97 (or 80 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The square root of 694643040 is about 26356.0816511104. The cubic root of 694643040 is about 885.6332153140.

The spelling of 694643040 in words is "six hundred ninety-four million, six hundred forty-three thousand, forty".