684736752 has 80 divisors (see below), whose sum is σ = 2024727552. Its totient is φ = 195336960.

The previous prime is 684736751. The next prime is 684736753. The reversal of 684736752 is 257637486.

It is an interprime number because it is at equal distance from previous prime (684736751) and next prime (684736753).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684736751) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 304978 + ... + 307214.

Almost surely, 2^684736752 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 684736752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1012363776).

684736752 is an abundant number, since it is smaller than the sum of its proper divisors (1339990800).

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

684736752 is a wasteful number, since it uses less digits than its factorization.

684736752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3166 (or 3160 counting only the distinct ones).

The product of its digits is 1693440, while the sum is 48.

The square root of 684736752 is about 26167.4750788073. The cubic root of 684736752 is about 881.4030442109.

The spelling of 684736752 in words is "six hundred eighty-four million, seven hundred thirty-six thousand, seven hundred fifty-two".