287878917492 has 72 divisors (see below), whose sum is σ = 745682962752. Its totient is φ = 93588969600.

The previous prime is 287878917463. The next prime is 287878917493. The reversal of 287878917492 is 294719878782.

287878917492 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×287878917492² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 287878917492.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (287878917493) 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, 4798183 + ... + 4857809.

It is an arithmetic number, because the mean of its divisors is an integer number (10356707816).

Almost surely, 2^287878917492 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 287878917492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (372841481376).

287878917492 is an abundant number, since it is smaller than the sum of its proper divisors (457804045260).

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

287878917492 is a wasteful number, since it uses less digits than its factorization.

287878917492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62949 (or 62944 counting only the distinct ones).

The product of its digits is 227598336, while the sum is 72.

The spelling of 287878917492 in words is "two hundred eighty-seven billion, eight hundred seventy-eight million, nine hundred seventeen thousand, four hundred ninety-two".