1438381845 has 48 divisors (see below), whose sum is σ = 2574554112. Its totient is φ = 742331520.

The previous prime is 1438381837. The next prime is 1438381897. The reversal of 1438381845 is 5481838341.

1438381845 is a `hidden beast` number, since 1 + 438 + 38 + 184 + 5 = 666.

It is not a de Polignac number, because 1438381845 - 2³ = 1438381837 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1438381845.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 315754 + ... + 320276.

It is an arithmetic number, because the mean of its divisors is an integer number (53636544).

Almost surely, 2^1438381845 is an apocalyptic number.

1438381845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1438381845 is a deficient number, since it is larger than the sum of its proper divisors (1136172267).

1438381845 is a wasteful number, since it uses less digits than its factorization.

1438381845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4762 (or 4759 counting only the distinct ones).

The product of its digits is 368640, while the sum is 45.

The square root of 1438381845 is about 37926.0048647363. The cubic root of 1438381845 is about 1128.8200921879.

The spelling of 1438381845 in words is "one billion, four hundred thirty-eight million, three hundred eighty-one thousand, eight hundred forty-five".