287438749 has 24 divisors (see below), whose sum is σ = 324656640. Its totient is φ = 254060352.

The previous prime is 287438689. The next prime is 287438779. The reversal of 287438749 is 947834782.

It is a de Polignac number, because none of the positive numbers 2^k-287438749 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 287438696 and 287438705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (287438779) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1092792 + ... + 1093054.

It is an arithmetic number, because the mean of its divisors is an integer number (13527360).

Almost surely, 2^287438749 is an apocalyptic number.

287438749 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

287438749 is a deficient number, since it is larger than the sum of its proper divisors (37217891).

287438749 is a wasteful number, since it uses less digits than its factorization.

287438749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541 (or 528 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 52.

The square root of 287438749 is about 16954.0186681506. The cubic root of 287438749 is about 659.9561870212.

The spelling of 287438749 in words is "two hundred eighty-seven million, four hundred thirty-eight thousand, seven hundred forty-nine".