285990510078 has 240 divisors, whose sum is σ = 811103421744. Its totient is φ = 74645867520.

The previous prime is 285990510067. The next prime is 285990510089. The reversal of 285990510078 is 870015099582.

285990510078 is a `hidden beast` number, since 2 + 8 + 59 + 9 + 0 + 510 + 0 + 78 = 666.

It is an interprime number because it is at equal distance from previous prime (285990510067) and next prime (285990510089).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 9995533 + ... + 10024103.

Almost surely, 2^285990510078 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 285990510078, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (405551710872).

285990510078 is an abundant number, since it is smaller than the sum of its proper divisors (525112911666).

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

285990510078 is a wasteful number, since it uses less digits than its factorization.

285990510078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28709 (or 28693 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 54.

The spelling of 285990510078 in words is "two hundred eighty-five billion, nine hundred ninety million, five hundred ten thousand, seventy-eight".