686154372 has 96 divisors (see below), whose sum is σ = 1752145920. Its totient is φ = 208189440.

The previous prime is 686154367. The next prime is 686154383. The reversal of 686154372 is 273451686.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1363873 + ... + 1364375.

It is an arithmetic number, because the mean of its divisors is an integer number (18251520).

Almost surely, 2^686154372 is an apocalyptic number.

686154372 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 686154372, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (876072960).

686154372 is an abundant number, since it is smaller than the sum of its proper divisors (1065991548).

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

686154372 is a wasteful number, since it uses less digits than its factorization.

686154372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 753 (or 751 counting only the distinct ones).

The product of its digits is 241920, while the sum is 42.

The square root of 686154372 is about 26194.5485168193. The cubic root of 686154372 is about 882.0108852478.

The spelling of 686154372 in words is "six hundred eighty-six million, one hundred fifty-four thousand, three hundred seventy-two".