684397260 has 36 divisors (see below), whose sum is σ = 2076005568. Its totient is φ = 182505888.

The previous prime is 684397213. The next prime is 684397267. The reversal of 684397260 is 62793486.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is not an unprimeable number, because it can be changed into a prime (684397267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1900924 + ... + 1901283.

Almost surely, 2^684397260 is an apocalyptic number.

684397260 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

684397260 is an abundant number, since it is smaller than the sum of its proper divisors (1391608308).

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

684397260 is a wasteful number, since it uses less digits than its factorization.

684397260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3802222 (or 3802217 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The square root of 684397260 is about 26160.9873666878. The cubic root of 684397260 is about 881.2573537941.

The spelling of 684397260 in words is "six hundred eighty-four million, three hundred ninety-seven thousand, two hundred sixty".