287420475 has 12 divisors (see below), whose sum is σ = 475201976. Its totient is φ = 153290880.

The previous prime is 287420473. The next prime is 287420519. The reversal of 287420475 is 574024782.

It is not a de Polignac number, because 287420475 - 2¹ = 287420473 is a prime.

It is a super-2 number, since 2×287420475² = 165221058898451250, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (287420473) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1916062 + ... + 1916211.

Almost surely, 2^287420475 is an apocalyptic number.

287420475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

287420475 is a deficient number, since it is larger than the sum of its proper divisors (187781501).

287420475 is a wasteful number, since it uses less digits than its factorization.

287420475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3832286 (or 3832281 counting only the distinct ones).

The product of its (nonzero) digits is 125440, while the sum is 39.

The square root of 287420475 is about 16953.4797313118. The cubic root of 287420475 is about 659.9422010909.

The spelling of 287420475 in words is "two hundred eighty-seven million, four hundred twenty thousand, four hundred seventy-five".