1438648745 has 16 divisors (see below), whose sum is σ = 1819584000. Its totient is φ = 1088938368.

The previous prime is 1438648727. The next prime is 1438648751. The reversal of 1438648745 is 5478468341.

It is a cyclic number.

It is not a de Polignac number, because 1438648745 - 2²⁶ = 1371539881 is a prime.

It is a super-2 number, since 2×1438648745² = 4139420422980150050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1438648693 and 1438648702.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67496 + ... + 86214.

It is an arithmetic number, because the mean of its divisors is an integer number (113724000).

Almost surely, 2^1438648745 is an apocalyptic number.

It is an amenable number.

1438648745 is a deficient number, since it is larger than the sum of its proper divisors (380935255).

1438648745 is a wasteful number, since it uses less digits than its factorization.

1438648745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19552.

The product of its digits is 2580480, while the sum is 50.

The square root of 1438648745 is about 37929.5233953711. The cubic root of 1438648745 is about 1128.8899075504.

The spelling of 1438648745 in words is "one billion, four hundred thirty-eight million, six hundred forty-eight thousand, seven hundred forty-five".