288631493 has 4 divisors (see below), whose sum is σ = 291185868. Its totient is φ = 286077120.

The previous prime is 288631433. The next prime is 288631501. The reversal of 288631493 is 394136882.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 68939809 + 219691684 = 8303^2 + 14822^2 .

It is a cyclic number.

It is not a de Polignac number, because 288631493 - 2⁶ = 288631429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (288631433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1277018 + ... + 1277243.

It is an arithmetic number, because the mean of its divisors is an integer number (72796467).

Almost surely, 2^288631493 is an apocalyptic number.

It is an amenable number.

288631493 is a deficient number, since it is larger than the sum of its proper divisors (2554375).

288631493 is a wasteful number, since it uses less digits than its factorization.

288631493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2554374.

The product of its digits is 248832, while the sum is 44.

The square root of 288631493 is about 16989.1581015658. The cubic root of 288631493 is about 660.8677696348.

The spelling of 288631493 in words is "two hundred eighty-eight million, six hundred thirty-one thousand, four hundred ninety-three".