287470040 has 128 divisors (see below), whose sum is σ = 786542400. Its totient is φ = 93112320.

The previous prime is 287469997. The next prime is 287470061. The reversal of 287470040 is 40074782.

It is a junction number, because it is equal to n+sod(n) for n = 287469979 and 287470006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 165014 + ... + 166746.

Almost surely, 2^287470040 is an apocalyptic number.

287470040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 287470040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (393271200).

287470040 is an abundant number, since it is smaller than the sum of its proper divisors (499072360).

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

287470040 is a wasteful number, since it uses less digits than its factorization.

287470040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1797 (or 1793 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 32.

The square root of 287470040 is about 16954.9414625943. The cubic root of 287470040 is about 659.9801340822.

The spelling of 287470040 in words is "two hundred eighty-seven million, four hundred seventy thousand, forty".