1438890880 has 192 divisors, whose sum is σ = 4238406000. Its totient is φ = 464142336.

The previous prime is 1438890851. The next prime is 1438890907. The reversal of 1438890880 is 880988341.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 531771 + ... + 534469.

Almost surely, 2^1438890880 is an apocalyptic number.

1438890880 is a gapful number since it is divisible by the number (10) 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 1438890880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2119203000).

1438890880 is an abundant number, since it is smaller than the sum of its proper divisors (2799515120).

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

1438890880 is a wasteful number, since it uses less digits than its factorization.

1438890880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2749 (or 2730 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 49.

The square root of 1438890880 is about 37932.7151677810. The cubic root of 1438890880 is about 1128.9532374458.

The spelling of 1438890880 in words is "one billion, four hundred thirty-eight million, eight hundred ninety thousand, eight hundred eighty".