285439077 has 48 divisors (see below), whose sum is σ = 515953152. Its totient is φ = 147728160.

The previous prime is 285439067. The next prime is 285439093. The reversal of 285439077 is 770934582.

It is not a de Polignac number, because 285439077 - 2⁸ = 285438821 is a prime.

It is a super-2 number, since 2×285439077² = 162950933357223858, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285439057) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 239878 + ... + 241064.

It is an arithmetic number, because the mean of its divisors is an integer number (10749024).

Almost surely, 2^285439077 is an apocalyptic number.

It is an amenable number.

285439077 is a deficient number, since it is larger than the sum of its proper divisors (230514075).

285439077 is a wasteful number, since it uses less digits than its factorization.

285439077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1558 (or 1555 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 45.

The square root of 285439077 is about 16894.9423497093. The cubic root of 285439077 is about 658.4222160325.

The spelling of 285439077 in words is "two hundred eighty-five million, four hundred thirty-nine thousand, seventy-seven".