686142050 has 48 divisors (see below), whose sum is σ = 1399464000. Its totient is φ = 248212800.

The previous prime is 686142043. The next prime is 686142053. The reversal of 686142050 is 50241686.

It is a junction number, because it is equal to n+sod(n) for n = 686141998 and 686142016.

It is not an unprimeable number, because it can be changed into a prime (686142053) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 106316 + ... + 112584.

It is an arithmetic number, because the mean of its divisors is an integer number (29155500).

Almost surely, 2^686142050 is an apocalyptic number.

686142050 is an abundant number, since it is smaller than the sum of its proper divisors (713321950).

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

686142050 is a wasteful number, since it uses less digits than its factorization.

686142050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6491 (or 6486 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 686142050 is about 26194.3133141527. The cubic root of 686142050 is about 882.0056054820.

The spelling of 686142050 in words is "six hundred eighty-six million, one hundred forty-two thousand, fifty".