287920460 has 12 divisors (see below), whose sum is σ = 604633008. Its totient is φ = 115168176.

The previous prime is 287920411. The next prime is 287920537. The reversal of 287920460 is 64029782.

It is a super-2 number, since 2×287920460² = 165796382573223200, which contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 7197992 + ... + 7198031.

It is an arithmetic number, because the mean of its divisors is an integer number (50386084).

Almost surely, 2^287920460 is an apocalyptic number.

287920460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

287920460 is an abundant number, since it is smaller than the sum of its proper divisors (316712548).

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

287920460 is a wasteful number, since it uses less digits than its factorization.

287920460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14396032 (or 14396030 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 287920460 is about 16968.2191169256. The cubic root of 287920460 is about 660.3246489744.

The spelling of 287920460 in words is "two hundred eighty-seven million, nine hundred twenty thousand, four hundred sixty".