285451949 has 4 divisors (see below), whose sum is σ = 285614364. Its totient is φ = 285289536.

The previous prime is 285451927. The next prime is 285451951. The reversal of 285451949 is 949154582.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 86359849 + 199092100 = 9293^2 + 14110^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-285451949 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 (285451549) 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 3 ways as a sum of consecutive naturals, for example, 78542 + ... + 82095.

It is an arithmetic number, because the mean of its divisors is an integer number (71403591).

Almost surely, 2^285451949 is an apocalyptic number.

It is an amenable number.

285451949 is a deficient number, since it is larger than the sum of its proper divisors (162415).

285451949 is a wasteful number, since it uses less digits than its factorization.

285451949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162414.

The product of its digits is 518400, while the sum is 47.

The square root of 285451949 is about 16895.3232878214. The cubic root of 285451949 is about 658.4321131630.

The spelling of 285451949 in words is "two hundred eighty-five million, four hundred fifty-one thousand, nine hundred forty-nine".