287390488 has 144 divisors (see below), whose sum is σ = 706852440. Its totient is φ = 109105920.

The previous prime is 287390483. The next prime is 287390501. The reversal of 287390488 is 884093782.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (287390483) by changing a digit.

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 35 ways as a sum of consecutive naturals, for example, 3462495 + ... + 3462577.

Almost surely, 2^287390488 is an apocalyptic number.

287390488 is a gapful number since it is divisible by the number (28) 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 287390488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (353426220).

287390488 is an abundant number, since it is smaller than the sum of its proper divisors (419461952).

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

287390488 is a wasteful number, since it uses less digits than its factorization.

287390488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198 (or 176 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 49.

The square root of 287390488 is about 16952.5953175318. The cubic root of 287390488 is about 659.9192493799.

The spelling of 287390488 in words is "two hundred eighty-seven million, three hundred ninety thousand, four hundred eighty-eight".