287883660820 has 24 divisors (see below), whose sum is σ = 690920786304. Its totient is φ = 98702969376.

The previous prime is 287883660817. The next prime is 287883660877. The reversal of 287883660820 is 28066388782.

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, 1028155792 + ... + 1028156071.

It is an arithmetic number, because the mean of its divisors is an integer number (28788366096).

Almost surely, 2^287883660820 is an apocalyptic number.

287883660820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

287883660820 is an abundant number, since it is smaller than the sum of its proper divisors (403037125484).

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

287883660820 is a wasteful number, since it uses less digits than its factorization.

287883660820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2056311879 (or 2056311877 counting only the distinct ones).

The product of its (nonzero) digits is 12386304, while the sum is 58.

The spelling of 287883660820 in words is "two hundred eighty-seven billion, eight hundred eighty-three million, six hundred sixty thousand, eight hundred twenty".