684140250 has 32 divisors (see below), whose sum is σ = 1707615936. Its totient is φ = 182437200.

The previous prime is 684140203. The next prime is 684140257. The reversal of 684140250 is 52041486.

684140250 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×684140250³ (a number of 27 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (684140257) 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, 455344 + ... + 456843.

It is an arithmetic number, because the mean of its divisors is an integer number (53362998).

Almost surely, 2^684140250 is an apocalyptic number.

684140250 is an abundant number, since it is smaller than the sum of its proper divisors (1023475686).

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

684140250 is a wasteful number, since it uses less digits than its factorization.

684140250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 912207 (or 912197 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 684140250 is about 26156.0748202019. The cubic root of 684140250 is about 881.1470278557.

The spelling of 684140250 in words is "six hundred eighty-four million, one hundred forty thousand, two hundred fifty".