1491467388 has 24 divisors (see below), whose sum is σ = 3480793680. Its totient is φ = 497055360.

The previous prime is 1491467387. The next prime is 1491467401. The reversal of 1491467388 is 8837641941.

It is a self number, because there is not a number n which added to its sum of digits gives 1491467388.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1491467387) 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 7 ways as a sum of consecutive naturals, for example, 72208 + ... + 90536.

It is an arithmetic number, because the mean of its divisors is an integer number (145033070).

Almost surely, 2^1491467388 is an apocalyptic number.

It is an amenable number.

1491467388 is an abundant number, since it is smaller than the sum of its proper divisors (1989326292).

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

1491467388 is a wasteful number, since it uses less digits than its factorization.

1491467388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25117 (or 25115 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 51.

The square root of 1491467388 is about 38619.5208152561. The cubic root of 1491467388 is about 1142.5395799850.

The spelling of 1491467388 in words is "one billion, four hundred ninety-one million, four hundred sixty-seven thousand, three hundred eighty-eight".