287942172 has 48 divisors (see below), whose sum is σ = 775783680. Its totient is φ = 81418752.

The previous prime is 287942153. The next prime is 287942183. The reversal of 287942172 is 271249782.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9522 + ... + 25817.

It is an arithmetic number, because the mean of its divisors is an integer number (16162160).

Almost surely, 2^287942172 is an apocalyptic number.

It is an amenable number.

287942172 is an abundant number, since it is smaller than the sum of its proper divisors (487841508).

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

287942172 is a wasteful number, since it uses less digits than its factorization.

287942172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35450 (or 35448 counting only the distinct ones).

The product of its digits is 112896, while the sum is 42.

The square root of 287942172 is about 16968.8588891534. The cubic root of 287942172 is about 660.3412468552.

The spelling of 287942172 in words is "two hundred eighty-seven million, nine hundred forty-two thousand, one hundred seventy-two".