287420345 has 16 divisors (see below), whose sum is σ = 351846912. Its totient is φ = 225348480.

The previous prime is 287420333. The next prime is 287420347. The reversal of 287420345 is 543024782.

It is not a de Polignac number, because 287420345 - 2⁶ = 287420281 is a prime.

It is a super-2 number, since 2×287420345² = 165220909439838050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (287420347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57080 + ... + 61910.

It is an arithmetic number, because the mean of its divisors is an integer number (21990432).

Almost surely, 2^287420345 is an apocalyptic number.

It is an amenable number.

287420345 is a deficient number, since it is larger than the sum of its proper divisors (64426567).

287420345 is a wasteful number, since it uses less digits than its factorization.

287420345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5072.

The product of its (nonzero) digits is 53760, while the sum is 35.

The square root of 287420345 is about 16953.4758972902. The cubic root of 287420345 is about 659.9421015938.

The spelling of 287420345 in words is "two hundred eighty-seven million, four hundred twenty thousand, three hundred forty-five".