287428962820 has 48 divisors (see below), whose sum is σ = 613591469568. Its totient is φ = 113084142080.

The previous prime is 287428962757. The next prime is 287428962853. The reversal of 287428962820 is 28269824782.

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, 189364 + ... + 781483.

It is an arithmetic number, because the mean of its divisors is an integer number (12783155616).

Almost surely, 2^287428962820 is an apocalyptic number.

287428962820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

287428962820 is an abundant number, since it is smaller than the sum of its proper divisors (326162506748).

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

287428962820 is a wasteful number, since it uses less digits than its factorization.

287428962820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 971100 (or 971098 counting only the distinct ones).

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

The spelling of 287428962820 in words is "two hundred eighty-seven billion, four hundred twenty-eight million, nine hundred sixty-two thousand, eight hundred twenty".