2388629381 has 4 divisors (see below), whose sum is σ = 2389277100. Its totient is φ = 2387981664.

The previous prime is 2388629371. The next prime is 2388629389. The reversal of 2388629381 is 1839268832.

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 1014741025 + 1373888356 = 31855^2 + 37066^2 .

It is a cyclic number.

It is not a de Polignac number, because 2388629381 - 2¹⁰ = 2388628357 is a prime.

It is a super-2 number, since 2×2388629381² = 11411100639552886322, 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 (2388629389) 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, 318296 + ... + 325713.

It is an arithmetic number, because the mean of its divisors is an integer number (597319275).

Almost surely, 2^2388629381 is an apocalyptic number.

It is an amenable number.

2388629381 is a deficient number, since it is larger than the sum of its proper divisors (647719).

2388629381 is an equidigital number, since it uses as much as digits as its factorization.

2388629381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647718.

The product of its digits is 995328, while the sum is 50.

The square root of 2388629381 is about 48873.6061796140. The cubic root of 2388629381 is about 1336.7481446579.

The spelling of 2388629381 in words is "two billion, three hundred eighty-eight million, six hundred twenty-nine thousand, three hundred eighty-one".