2398935781 has 8 divisors (see below), whose sum is σ = 2621811744. Its totient is φ = 2176858320.

The previous prime is 2398935779. The next prime is 2398935787. The reversal of 2398935781 is 1875398932.

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 2398935781 - 2¹ = 2398935779 is a prime.

It is a super-2 number, since 2×2398935781² = 11509785762724159922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2398935787) 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, 193330 + ... + 205363.

It is an arithmetic number, because the mean of its divisors is an integer number (327726468).

Almost surely, 2^2398935781 is an apocalyptic number.

It is an amenable number.

2398935781 is a deficient number, since it is larger than the sum of its proper divisors (222875963).

2398935781 is a wasteful number, since it uses less digits than its factorization.

2398935781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399251.

The product of its digits is 3265920, while the sum is 55.

The square root of 2398935781 is about 48978.9320116313. The cubic root of 2398935781 is about 1338.6679755553.

The spelling of 2398935781 in words is "two billion, three hundred ninety-eight million, nine hundred thirty-five thousand, seven hundred eighty-one".