1438722180 has 216 divisors, whose sum is σ = 5265554112. Its totient is φ = 311444352.

The previous prime is 1438722163. The next prime is 1438722193. The reversal of 1438722180 is 812278341.

1438722180 is a `hidden beast` number, since 1 + 438 + 7 + 2 + 218 + 0 = 666.

It is a super-2 number, since 2×1438722180² = 4139843022447904800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 453279 + ... + 456441.

Almost surely, 2^1438722180 is an apocalyptic number.

1438722180 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 1438722180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2632777056).

1438722180 is an abundant number, since it is smaller than the sum of its proper divisors (3826831932).

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

1438722180 is a wasteful number, since it uses less digits than its factorization.

1438722180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3223 (or 3199 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 1438722180 is about 37930.4914284010. The cubic root of 1438722180 is about 1128.9091150695.

The spelling of 1438722180 in words is "one billion, four hundred thirty-eight million, seven hundred twenty-two thousand, one hundred eighty".