287990407 has 8 divisors (see below), whose sum is σ = 290673152. Its totient is φ = 285314400.

The previous prime is 287990401. The next prime is 287990411. The reversal of 287990407 is 704099782.

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

It is a cyclic number.

It is not a de Polignac number, because 287990407 - 2¹⁹ = 287466119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (287990401) 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, 128557 + ... + 130777.

It is an arithmetic number, because the mean of its divisors is an integer number (36334144).

Almost surely, 2^287990407 is an apocalyptic number.

287990407 is a deficient number, since it is larger than the sum of its proper divisors (2682745).

287990407 is a wasteful number, since it uses less digits than its factorization.

287990407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3369.

The product of its (nonzero) digits is 254016, while the sum is 46.

The square root of 287990407 is about 16970.2801096505. The cubic root of 287990407 is about 660.3781174318.

The spelling of 287990407 in words is "two hundred eighty-seven million, nine hundred ninety thousand, four hundred seven".