287278478 has 16 divisors (see below), whose sum is σ = 458187840. Its totient is φ = 134620416.

The previous prime is 287278477. The next prime is 287278501. The reversal of 287278478 is 874872782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (287278477) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9551 + ... + 25802.

It is an arithmetic number, because the mean of its divisors is an integer number (28636740).

Almost surely, 2^287278478 is an apocalyptic number.

287278478 is a deficient number, since it is larger than the sum of its proper divisors (170909362).

287278478 is a wasteful number, since it uses less digits than its factorization.

287278478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35611.

The product of its digits is 2809856, while the sum is 53.

The square root of 287278478 is about 16949.2913716179. The cubic root of 287278478 is about 659.8335040689.

The spelling of 287278478 in words is "two hundred eighty-seven million, two hundred seventy-eight thousand, four hundred seventy-eight".