1438484390 has 64 divisors (see below), whose sum is σ = 3068789760. Its totient is φ = 475009920.

The previous prime is 1438484317. The next prime is 1438484401. The reversal of 1438484390 is 934848341.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1280369 + ... + 1281491.

It is an arithmetic number, because the mean of its divisors is an integer number (47949840).

Almost surely, 2^1438484390 is an apocalyptic number.

1438484390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1438484390 is an abundant number, since it is smaller than the sum of its proper divisors (1630305370).

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

1438484390 is a wasteful number, since it uses less digits than its factorization.

1438484390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1797.

The product of its (nonzero) digits is 331776, while the sum is 44.

The square root of 1438484390 is about 37927.3567494493. The cubic root of 1438484390 is about 1128.8469168001.

The spelling of 1438484390 in words is "one billion, four hundred thirty-eight million, four hundred eighty-four thousand, three hundred ninety".