285428877880 has 64 divisors (see below), whose sum is σ = 676344362400. Its totient is φ = 108109946880.

The previous prime is 285428877863. The next prime is 285428877907. The reversal of 285428877880 is 88778824582.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1491324 + ... + 1671796.

Almost surely, 2^285428877880 is an apocalyptic number.

285428877880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

285428877880 is an abundant number, since it is smaller than the sum of its proper divisors (390915484520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

285428877880 is a wasteful number, since it uses less digits than its factorization.

285428877880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182584 (or 182580 counting only the distinct ones).

The product of its (nonzero) digits is 128450560, while the sum is 67.

The spelling of 285428877880 in words is "two hundred eighty-five billion, four hundred twenty-eight million, eight hundred seventy-seven thousand, eight hundred eighty".