287899120 has 20 divisors (see below), whose sum is σ = 669365640. Its totient is φ = 115159616.

The previous prime is 287899103. The next prime is 287899123. The reversal of 287899120 is 21998782.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (287899123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1799290 + ... + 1799449.

It is an arithmetic number, because the mean of its divisors is an integer number (33468282).

Almost surely, 2^287899120 is an apocalyptic number.

287899120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

287899120 is an abundant number, since it is smaller than the sum of its proper divisors (381466520).

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

287899120 is a wasteful number, since it uses less digits than its factorization.

287899120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3598752 (or 3598746 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 46.

The square root of 287899120 is about 16967.5902826536. The cubic root of 287899120 is about 660.3083346584.

The spelling of 287899120 in words is "two hundred eighty-seven million, eight hundred ninety-nine thousand, one hundred twenty".