1438040725 has 24 divisors (see below), whose sum is σ = 1946982528. Its totient is φ = 1044931200.

The previous prime is 1438040711. The next prime is 1438040743. The reversal of 1438040725 is 5270408341.

It is not a de Polignac number, because 1438040725 - 2¹⁵ = 1438007957 is a prime.

It is a super-2 number, since 2×1438040725² = 4135922253517051250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 586452 + ... + 588898.

It is an arithmetic number, because the mean of its divisors is an integer number (81124272).

Almost surely, 2^1438040725 is an apocalyptic number.

It is an amenable number.

1438040725 is a deficient number, since it is larger than the sum of its proper divisors (508941803).

1438040725 is a wasteful number, since it uses less digits than its factorization.

1438040725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4605 (or 4600 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 1438040725 is about 37921.5074199326. The cubic root of 1438040725 is about 1128.7308498783.

The spelling of 1438040725 in words is "one billion, four hundred thirty-eight million, forty thousand, seven hundred twenty-five".