684373950 has 108 divisors (see below), whose sum is σ = 1991223000. Its totient is φ = 168442560.

The previous prime is 684373933. The next prime is 684373951. The reversal of 684373950 is 59373486.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 684373896 and 684373905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684373951) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 71551 + ... + 80549.

It is an arithmetic number, because the mean of its divisors is an integer number (18437250).

Almost surely, 2^684373950 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 684373950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (995611500).

684373950 is an abundant number, since it is smaller than the sum of its proper divisors (1306849050).

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

684373950 is a wasteful number, since it uses less digits than its factorization.

684373950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9043 (or 9022 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 45.

The square root of 684373950 is about 26160.5418521865. The cubic root of 684373950 is about 881.2473487169.

The spelling of 684373950 in words is "six hundred eighty-four million, three hundred seventy-three thousand, nine hundred fifty".