685283424 has 72 divisors (see below), whose sum is σ = 2092576248. Its totient is φ = 195793920.

The previous prime is 685283419. The next prime is 685283449. The reversal of 685283424 is 424382586.

It is a super-2 number, since 2×685283424² = 939226742418327552, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68137 + ... + 77544.

It is an arithmetic number, because the mean of its divisors is an integer number (29063559).

Almost surely, 2^685283424 is an apocalyptic number.

It is an amenable number.

685283424 is an abundant number, since it is smaller than the sum of its proper divisors (1407292824).

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

685283424 is a wasteful number, since it uses less digits than its factorization.

685283424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145708 (or 145693 counting only the distinct ones).

The product of its digits is 368640, while the sum is 42.

The square root of 685283424 is about 26177.9186338410. The cubic root of 685283424 is about 881.6375431831.

The spelling of 685283424 in words is "six hundred eighty-five million, two hundred eighty-three thousand, four hundred twenty-four".