1438145144 has 8 divisors (see below), whose sum is σ = 2696522160. Its totient is φ = 719072568.

The previous prime is 1438145101. The next prime is 1438145147. The reversal of 1438145144 is 4415418341.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×1438145144² = 4136522910421561472, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1438145147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 89884064 + ... + 89884079.

It is an arithmetic number, because the mean of its divisors is an integer number (337065270).

Almost surely, 2^1438145144 is an apocalyptic number.

It is an amenable number.

1438145144 is a deficient number, since it is larger than the sum of its proper divisors (1258377016).

1438145144 is a wasteful number, since it uses less digits than its factorization.

1438145144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179768149 (or 179768145 counting only the distinct ones).

The product of its digits is 30720, while the sum is 35.

The square root of 1438145144 is about 37922.8841730162. The cubic root of 1438145144 is about 1128.7581690151.

The spelling of 1438145144 in words is "one billion, four hundred thirty-eight million, one hundred forty-five thousand, one hundred forty-four".