1438661088 has 192 divisors, whose sum is σ = 4330347840. Its totient is φ = 470292480.

The previous prime is 1438661053. The next prime is 1438661093. The reversal of 1438661088 is 8801668341.

It is a happy number.

It is a super-2 number, since 2×1438661088² = 4139491452250687488, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4268856 + ... + 4269192.

It is an arithmetic number, because the mean of its divisors is an integer number (22553895).

Almost surely, 2^1438661088 is an apocalyptic number.

1438661088 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1438661088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2165173920).

1438661088 is an abundant number, since it is smaller than the sum of its proper divisors (2891686752).

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

1438661088 is an frugal number, since it uses more digits than its factorization.

1438661088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429 (or 403 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The square root of 1438661088 is about 37929.6861046859. The cubic root of 1438661088 is about 1128.8931360077.

The spelling of 1438661088 in words is "one billion, four hundred thirty-eight million, six hundred sixty-one thousand, eighty-eight".