287713440 has 576 divisors, whose sum is σ = 1256726016. Its totient is φ = 58392576.

The previous prime is 287713429. The next prime is 287713453. The reversal of 287713440 is 44317782.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 287713395 and 287713404.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3941244 + ... + 3941316.

It is an arithmetic number, because the mean of its divisors is an integer number (2181816).

Almost surely, 2^287713440 is an apocalyptic number.

287713440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 287713440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (628363008).

287713440 is an abundant number, since it is smaller than the sum of its proper divisors (969012576).

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

287713440 is a wasteful number, since it uses less digits than its factorization.

287713440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141 (or 130 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The square root of 287713440 is about 16962.1177923041. The cubic root of 287713440 is about 660.1663492537.

The spelling of 287713440 in words is "two hundred eighty-seven million, seven hundred thirteen thousand, four hundred forty".