684231042 has 96 divisors (see below), whose sum is σ = 1561577472. Its totient is φ = 199584000.

The previous prime is 684230969. The next prime is 684231043. The reversal of 684231042 is 240132486.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684231043) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3780192 + ... + 3780372.

It is an arithmetic number, because the mean of its divisors is an integer number (16266432).

Almost surely, 2^684231042 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 684231042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (780788736).

684231042 is an abundant number, since it is smaller than the sum of its proper divisors (877346430).

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

684231042 is a wasteful number, since it uses less digits than its factorization.

684231042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376 (or 365 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 684231042 is about 26157.8103441400. The cubic root of 684231042 is about 881.1860050305.

The spelling of 684231042 in words is "six hundred eighty-four million, two hundred thirty-one thousand, forty-two".