285777145720 has 32 divisors (see below), whose sum is σ = 701452995120. Its totient is φ = 103918961920.

The previous prime is 285777145663. The next prime is 285777145751. The reversal of 285777145720 is 27541777582.

It is a super-2 number, since 2×285777145720² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 324746317 + ... + 324747196.

Almost surely, 2^285777145720 is an apocalyptic number.

285777145720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

285777145720 is an abundant number, since it is smaller than the sum of its proper divisors (415675849400).

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

285777145720 is a wasteful number, since it uses less digits than its factorization.

285777145720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649493535 (or 649493531 counting only the distinct ones).

The product of its (nonzero) digits is 7683200, while the sum is 55.

The spelling of 285777145720 in words is "two hundred eighty-five billion, seven hundred seventy-seven million, one hundred forty-five thousand, seven hundred twenty".