287115420 has 48 divisors (see below), whose sum is σ = 804672288. Its totient is φ = 76492800.

The previous prime is 287115419. The next prime is 287115443. The reversal of 287115420 is 24511782.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106732 + ... + 109388.

It is an arithmetic number, because the mean of its divisors is an integer number (16764006).

Almost surely, 2^287115420 is an apocalyptic number.

287115420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

287115420 is an abundant number, since it is smaller than the sum of its proper divisors (517556868).

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

287115420 is a wasteful number, since it uses less digits than its factorization.

287115420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4470 (or 4468 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 30.

The square root of 287115420 is about 16944.4805172658. The cubic root of 287115420 is about 659.7086409108.

The spelling of 287115420 in words is "two hundred eighty-seven million, one hundred fifteen thousand, four hundred twenty".