288919421 has 8 divisors (see below), whose sum is σ = 339118080. Its totient is φ = 240951888.

The previous prime is 288919391. The next prime is 288919457. The reversal of 288919421 is 124919882.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 288919421 - 2¹⁸ = 288657277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (288919121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 557501 + ... + 558018.

It is an arithmetic number, because the mean of its divisors is an integer number (42389760).

Almost surely, 2^288919421 is an apocalyptic number.

It is an amenable number.

288919421 is a deficient number, since it is larger than the sum of its proper divisors (50198659).

288919421 is a wasteful number, since it uses less digits than its factorization.

288919421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1115563.

The product of its digits is 82944, while the sum is 44.

The square root of 288919421 is about 16997.6298641899. The cubic root of 288919421 is about 661.0874489398.

The spelling of 288919421 in words is "two hundred eighty-eight million, nine hundred nineteen thousand, four hundred twenty-one".