4388349857 has 4 divisors (see below), whose sum is σ = 4388901780. Its totient is φ = 4387797936.

The previous prime is 4388349851. The next prime is 4388349869. The reversal of 4388349857 is 7589438834.

It is a happy number.

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 489471376 + 3898878481 = 22124^2 + 62441^2 .

It is a cyclic number.

It is not a de Polignac number, because 4388349857 - 2¹² = 4388345761 is a prime.

It is a super-2 number, since 2×4388349857² = 38515228934863840898, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4388349796 and 4388349805.

It is not an unprimeable number, because it can be changed into a prime (4388349851) 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, 263858 + ... + 279995.

It is an arithmetic number, because the mean of its divisors is an integer number (1097225445).

Almost surely, 2^4388349857 is an apocalyptic number.

It is an amenable number.

4388349857 is a deficient number, since it is larger than the sum of its proper divisors (551923).

4388349857 is an equidigital number, since it uses as much as digits as its factorization.

4388349857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551922.

The product of its digits is 23224320, while the sum is 59.

The square root of 4388349857 is about 66244.6213439250. The cubic root of 4388349857 is about 1637.1950189507.

The spelling of 4388349857 in words is "four billion, three hundred eighty-eight million, three hundred forty-nine thousand, eight hundred fifty-seven".