287878494 has 8 divisors (see below), whose sum is σ = 575757000. Its totient is φ = 95959496.

The previous prime is 287878489. The next prime is 287878501. The reversal of 287878494 is 494878782.

It is a sphenic number, since it is the product of 3 distinct primes.

287878494 is an admirable number.

It is a super-3 number, since 3×287878494³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23989869 + ... + 23989880.

It is an arithmetic number, because the mean of its divisors is an integer number (71969625).

Almost surely, 2^287878494 is an apocalyptic number.

287878494 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

287878494 is a wasteful number, since it uses less digits than its factorization.

287878494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47979754.

The product of its digits is 7225344, while the sum is 57.

The square root of 287878494 is about 16966.9824659543. The cubic root of 287878494 is about 660.2925654253.

The spelling of 287878494 in words is "two hundred eighty-seven million, eight hundred seventy-eight thousand, four hundred ninety-four".