1491068628 has 288 divisors, whose sum is σ = 4749696000. Its totient is φ = 402796800.

The previous prime is 1491068627. The next prime is 1491068639. The reversal of 1491068628 is 8268601941.

1491068628 is a `hidden beast` number, since 1 + 4 + 9 + 10 + 6 + 8 + 628 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1491068627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 10007098 + ... + 10007246.

It is an arithmetic number, because the mean of its divisors is an integer number (16492000).

Almost surely, 2^1491068628 is an apocalyptic number.

1491068628 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 1491068628, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2374848000).

1491068628 is an abundant number, since it is smaller than the sum of its proper divisors (3258627372).

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

1491068628 is a wasteful number, since it uses less digits than its factorization.

1491068628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268 (or 253 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The square root of 1491068628 is about 38614.3577960323. The cubic root of 1491068628 is about 1142.4377474551.

It can be divided in two parts, 14910 and 68628, that added together give a palindrome (83538).

The spelling of 1491068628 in words is "one billion, four hundred ninety-one million, sixty-eight thousand, six hundred twenty-eight".