287273232 has 30 divisors (see below), whose sum is σ = 803966462. Its totient is φ = 95757696.

The previous prime is 287273227. The next prime is 287273237. The reversal of 287273232 is 232372782.

It is an interprime number because it is at equal distance from previous prime (287273227) and next prime (287273237).

It can be written as a sum of positive squares in only one way, i.e., 246364416 + 40908816 = 15696^2 + 6396^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (287273237) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 997333 + ... + 997620.

Almost surely, 2^287273232 is an apocalyptic number.

It is an amenable number.

287273232 is an abundant number, since it is smaller than the sum of its proper divisors (516693230).

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

287273232 is a wasteful number, since it uses less digits than its factorization.

287273232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1994967 (or 1994958 counting only the distinct ones).

The product of its digits is 56448, while the sum is 36.

The square root of 287273232 is about 16949.1366151790. The cubic root of 287273232 is about 659.8294876320.

The spelling of 287273232 in words is "two hundred eighty-seven million, two hundred seventy-three thousand, two hundred thirty-two".