285422938 has 4 divisors (see below), whose sum is σ = 428134410. Its totient is φ = 142711468.

The previous prime is 285422927. The next prime is 285422981. The reversal of 285422938 is 839224582.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 277655569 + 7767369 = 16663^2 + 2787^2 .

It is a super-5 number, since 5×285422938⁵ (a number of 43 digits) contains 55555 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 285422894 and 285422903.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71355733 + ... + 71355736.

Almost surely, 2^285422938 is an apocalyptic number.

285422938 is a deficient number, since it is larger than the sum of its proper divisors (142711472).

285422938 is a wasteful number, since it uses less digits than its factorization.

285422938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142711471.

The product of its digits is 276480, while the sum is 43.

The square root of 285422938 is about 16894.4647148112. The cubic root of 285422938 is about 658.4098065235.

The spelling of 285422938 in words is "two hundred eighty-five million, four hundred twenty-two thousand, nine hundred thirty-eight".