1538483444 has 6 divisors (see below), whose sum is σ = 2692346034. Its totient is φ = 769241720.

The previous prime is 1538483431. The next prime is 1538483483. The reversal of 1538483444 is 4443848351.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1537580944 + 902500 = 39212^2 + 950^2 .

It is a super-2 number, since 2×1538483444² = 4733862614924202272, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1538483395 and 1538483404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192310427 + ... + 192310434.

It is an arithmetic number, because the mean of its divisors is an integer number (448724339).

Almost surely, 2^1538483444 is an apocalyptic number.

It is an amenable number.

1538483444 is a deficient number, since it is larger than the sum of its proper divisors (1153862590).

1538483444 is a wasteful number, since it uses less digits than its factorization.

1538483444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384620865 (or 384620863 counting only the distinct ones).

The product of its digits is 737280, while the sum is 44.

The square root of 1538483444 is about 39223.5062685630. The cubic root of 1538483444 is about 1154.4211523260.

The spelling of 1538483444 in words is "one billion, five hundred thirty-eight million, four hundred eighty-three thousand, four hundred forty-four".