684740430 has 192 divisors, whose sum is σ = 2082412800. Its totient is φ = 154344960.

The previous prime is 684740393. The next prime is 684740447. The reversal of 684740430 is 34047486.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1109482 + ... + 1110098.

It is an arithmetic number, because the mean of its divisors is an integer number (10845900).

Almost surely, 2^684740430 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 684740430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1041206400).

684740430 is an abundant number, since it is smaller than the sum of its proper divisors (1397672370).

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

684740430 is a wasteful number, since it uses less digits than its factorization.

684740430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719 (or 716 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 36.

The square root of 684740430 is about 26167.5453567965. The cubic root of 684740430 is about 881.4046223330.

The spelling of 684740430 in words is "six hundred eighty-four million, seven hundred forty thousand, four hundred thirty".