285674223640 has 32 divisors (see below), whose sum is σ = 692210620080. Its totient is φ = 105479713152.

The previous prime is 285674223629. The next prime is 285674223643. The reversal of 285674223640 is 46322476582.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285674223643) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 274686234 + ... + 274687273.

Almost surely, 2^285674223640 is an apocalyptic number.

285674223640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

285674223640 is an abundant number, since it is smaller than the sum of its proper divisors (406536396440).

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

285674223640 is a wasteful number, since it uses less digits than its factorization.

285674223640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549373531 (or 549373527 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 49.

The spelling of 285674223640 in words is "two hundred eighty-five billion, six hundred seventy-four million, two hundred twenty-three thousand, six hundred forty".