694124640 has 336 divisors, whose sum is σ = 2687153616. Its totient is φ = 167961600.

The previous prime is 694124581. The next prime is 694124677. The reversal of 694124640 is 46421496.

694124640 is a `hidden beast` number, since 6 + 9 + 4 + 1 + 2 + 4 + 640 = 666.

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 = 694124595 and 694124604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 1282770 + ... + 1283310.

It is an arithmetic number, because the mean of its divisors is an integer number (7997481).

Almost surely, 2^694124640 is an apocalyptic number.

694124640 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 694124640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1343576808).

694124640 is an abundant number, since it is smaller than the sum of its proper divisors (1993028976).

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

694124640 is a wasteful number, since it uses less digits than its factorization.

694124640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585 (or 562 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 694124640 is about 26346.2452732833. The cubic root of 694124640 is about 885.4128496063.

The spelling of 694124640 in words is "six hundred ninety-four million, one hundred twenty-four thousand, six hundred forty".