1438145138 has 8 divisors (see below), whose sum is σ = 2157839580. Its totient is φ = 718865280.

The previous prime is 1438145101. The next prime is 1438145147. The reversal of 1438145138 is 8315418341.

It can be written as a sum of positive squares in 2 ways, for example, as 1156476049 + 281669089 = 34007^2 + 16783^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1438145138² = 4136522875906078088, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94823 + ... + 108938.

Almost surely, 2^1438145138 is an apocalyptic number.

1438145138 is a deficient number, since it is larger than the sum of its proper divisors (719694442).

1438145138 is a wasteful number, since it uses less digits than its factorization.

1438145138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207292.

The product of its digits is 46080, while the sum is 38.

The square root of 1438145138 is about 37922.8840939083. The cubic root of 1438145138 is about 1128.7581674454.

The spelling of 1438145138 in words is "one billion, four hundred thirty-eight million, one hundred forty-five thousand, one hundred thirty-eight".