4398491556 has 36 divisors (see below), whose sum is σ = 11142780012. Its totient is φ = 1462950144.

The previous prime is 4398491551. The next prime is 4398491561. The reversal of 4398491556 is 6551948934.

4398491556 is a `hidden beast` number, since 4 + 3 + 9 + 84 + 9 + 1 + 556 = 666.

It is an interprime number because it is at equal distance from previous prime (4398491551) and next prime (4398491561).

It can be written as a sum of positive squares in 2 ways, for example, as 4218502500 + 179989056 = 64950^2 + 13416^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×4398491556² = 38693455936406602272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (4398491551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 117225 + ... + 150128.

It is an arithmetic number, because the mean of its divisors is an integer number (309521667).

Almost surely, 2^4398491556 is an apocalyptic number.

It is an amenable number.

4398491556 is an abundant number, since it is smaller than the sum of its proper divisors (6744288456).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4398491556 is a wasteful number, since it uses less digits than its factorization.

4398491556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267820 (or 267815 counting only the distinct ones).

The product of its digits is 4665600, while the sum is 54.

The square root of 4398491556 is about 66321.1245079575. The cubic root of 4398491556 is about 1638.4552621838.

The spelling of 4398491556 in words is "four billion, three hundred ninety-eight million, four hundred ninety-one thousand, five hundred fifty-six".