287680494 has 32 divisors (see below), whose sum is σ = 611434656. Its totient is φ = 89922560.

The previous prime is 287680487. The next prime is 287680507. The reversal of 287680494 is 494086782.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23644 + ... + 33680.

It is an arithmetic number, because the mean of its divisors is an integer number (19107333).

Almost surely, 2^287680494 is an apocalyptic number.

287680494 is an abundant number, since it is smaller than the sum of its proper divisors (323754162).

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

287680494 is a wasteful number, since it uses less digits than its factorization.

287680494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10340.

The product of its (nonzero) digits is 774144, while the sum is 48.

The square root of 287680494 is about 16961.1466003923. The cubic root of 287680494 is about 660.1411497927.

The spelling of 287680494 in words is "two hundred eighty-seven million, six hundred eighty thousand, four hundred ninety-four".