287420344 has 16 divisors (see below), whose sum is σ = 556297920. Its totient is φ = 139074240.

The previous prime is 287420333. The next prime is 287420347. The reversal of 287420344 is 443024782.

287420344 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×287420344² = 165220908290156672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (287420347) 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, 579229 + ... + 579724.

It is an arithmetic number, because the mean of its divisors is an integer number (34768620).

Almost surely, 2^287420344 is an apocalyptic number.

It is an amenable number.

287420344 is a deficient number, since it is larger than the sum of its proper divisors (268877576).

287420344 is a wasteful number, since it uses less digits than its factorization.

287420344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1158990 (or 1158986 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 34.

The square root of 287420344 is about 16953.4758677977. The cubic root of 287420344 is about 659.9421008284.

The spelling of 287420344 in words is "two hundred eighty-seven million, four hundred twenty thousand, three hundred forty-four".