1438371774 has 72 divisors (see below), whose sum is σ = 3654114048. Its totient is φ = 407695680.

The previous prime is 1438371757. The next prime is 1438371793. The reversal of 1438371774 is 4771738341.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 105594 + ... + 118434.

It is an arithmetic number, because the mean of its divisors is an integer number (50751584).

Almost surely, 2^1438371774 is an apocalyptic number.

1438371774 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1438371774, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1827057024).

1438371774 is an abundant number, since it is smaller than the sum of its proper divisors (2215742274).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1438371774 is a wasteful number, since it uses less digits than its factorization.

1438371774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12990 (or 12980 counting only the distinct ones).

The product of its digits is 395136, while the sum is 45.

The square root of 1438371774 is about 37925.8720928076. The cubic root of 1438371774 is about 1128.8174576594.

The spelling of 1438371774 in words is "one billion, four hundred thirty-eight million, three hundred seventy-one thousand, seven hundred seventy-four".