285470939 has 4 divisors (see below), whose sum is σ = 307430256. Its totient is φ = 263511624.

The previous prime is 285470929. The next prime is 285470993. The reversal of 285470939 is 939074582.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 285470939 - 2⁴ = 285470923 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 285470893 and 285470902.

It is not an unprimeable number, because it can be changed into a prime (285470929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10979639 + ... + 10979664.

It is an arithmetic number, because the mean of its divisors is an integer number (76857564).

Almost surely, 2^285470939 is an apocalyptic number.

285470939 is a deficient number, since it is larger than the sum of its proper divisors (21959317).

285470939 is a wasteful number, since it uses less digits than its factorization.

285470939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21959316.

The product of its (nonzero) digits is 544320, while the sum is 47.

The square root of 285470939 is about 16895.8852683131. The cubic root of 285470939 is about 658.4467138090.

The spelling of 285470939 in words is "two hundred eighty-five million, four hundred seventy thousand, nine hundred thirty-nine".