4390494381 has 128 divisors (see below), whose sum is σ = 8412364800. Its totient is φ = 2200919040.

The previous prime is 4390494371. The next prime is 4390494391. The reversal of 4390494381 is 1834940934.

It is a happy number.

4390494381 is a `hidden beast` number, since 43 + 90 + 494 + 38 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (4390494371) and next prime (4390494391).

It is not a de Polignac number, because 4390494381 - 2⁵ = 4390494349 is a prime.

It is a super-2 number, since 2×4390494381² = 38552881819185146322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4390494371) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 4493365 + ... + 4494341.

It is an arithmetic number, because the mean of its divisors is an integer number (65721600).

Almost surely, 2^4390494381 is an apocalyptic number.

It is an amenable number.

4390494381 is a deficient number, since it is larger than the sum of its proper divisors (4021870419).

4390494381 is a wasteful number, since it uses less digits than its factorization.

4390494381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1096 (or 1090 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The square root of 4390494381 is about 66260.8057678142. The cubic root of 4390494381 is about 1637.4616668065.

The spelling of 4390494381 in words is "four billion, three hundred ninety million, four hundred ninety-four thousand, three hundred eighty-one".