1438528645 has 8 divisors (see below), whose sum is σ = 1728249120. Its totient is φ = 1149479760.

The previous prime is 1438528643. The next prime is 1438528669. The reversal of 1438528645 is 5468258341.

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

It is not a de Polignac number, because 1438528645 - 2¹ = 1438528643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1438528595 and 1438528604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1438528643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163171 + ... + 171760.

It is an arithmetic number, because the mean of its divisors is an integer number (216031140).

Almost surely, 2^1438528645 is an apocalyptic number.

It is an amenable number.

1438528645 is a deficient number, since it is larger than the sum of its proper divisors (289720475).

1438528645 is an equidigital number, since it uses as much as digits as its factorization.

1438528645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335795.

The product of its digits is 921600, while the sum is 46.

The square root of 1438528645 is about 37927.9401628931. The cubic root of 1438528645 is about 1128.8584930138.

The spelling of 1438528645 in words is "one billion, four hundred thirty-eight million, five hundred twenty-eight thousand, six hundred forty-five".