285404407 has 6 divisors (see below), whose sum is σ = 286885608. Its totient is φ = 283930812.

The previous prime is 285404393. The next prime is 285404429. The reversal of 285404407 is 704404582.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-285404407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285404437) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35998 + ... + 43204.

It is an arithmetic number, because the mean of its divisors is an integer number (47814268).

Almost surely, 2^285404407 is an apocalyptic number.

285404407 is a deficient number, since it is larger than the sum of its proper divisors (1481201).

285404407 is an frugal number, since it uses more digits than its factorization.

285404407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7605 (or 7406 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 34.

The square root of 285404407 is about 16893.9162718418. The cubic root of 285404407 is about 658.3955571943.

Adding to 285404407 its reverse (704404582), we get a palindrome (989808989).

The spelling of 285404407 in words is "two hundred eighty-five million, four hundred four thousand, four hundred seven".