4722878381 has 4 divisors (see below), whose sum is σ = 5086176732. Its totient is φ = 4359580032.

The previous prime is 4722878359. The next prime is 4722878387. The reversal of 4722878381 is 1838782274.

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 192376900 + 4530501481 = 13870^2 + 67309^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4722878381 is a prime.

It is a super-2 number, since 2×4722878381² = 44611160403434362322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4722878387) 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, 181649156 + ... + 181649181.

It is an arithmetic number, because the mean of its divisors is an integer number (1271544183).

Almost surely, 2^4722878381 is an apocalyptic number.

It is an amenable number.

4722878381 is a deficient number, since it is larger than the sum of its proper divisors (363298351).

4722878381 is a wasteful number, since it uses less digits than its factorization.

4722878381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363298350.

The product of its digits is 1204224, while the sum is 50.

The square root of 4722878381 is about 68723.2011841707. The cubic root of 4722878381 is about 1677.7822187261.

The spelling of 4722878381 in words is "four billion, seven hundred twenty-two million, eight hundred seventy-eight thousand, three hundred eighty-one".