1491426144 has 144 divisors (see below), whose sum is σ = 4582639152. Its totient is φ = 457380864.

The previous prime is 1491426113. The next prime is 1491426161. The reversal of 1491426144 is 4416241941.

It is a happy number.

1491426144 is a `hidden beast` number, since 1 + 4 + 91 + 426 + 144 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

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

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 1491426099 and 1491426108.

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, 1748022 + ... + 1748874.

It is an arithmetic number, because the mean of its divisors is an integer number (31823883).

Almost surely, 2^1491426144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1491426144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2291319576).

1491426144 is an abundant number, since it is smaller than the sum of its proper divisors (3091213008).

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

1491426144 is a wasteful number, since it uses less digits than its factorization.

1491426144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1349 (or 1338 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 1491426144 is about 38618.9868329038. The cubic root of 1491426144 is about 1142.5290482234.

The spelling of 1491426144 in words is "one billion, four hundred ninety-one million, four hundred twenty-six thousand, one hundred forty-four".