1491474782 has 16 divisors (see below), whose sum is σ = 2611215360. Its totient is φ = 625603128.

The previous prime is 1491474779. The next prime is 1491474791. The reversal of 1491474782 is 2874741941.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1132682 + ... + 1133997.

It is an arithmetic number, because the mean of its divisors is an integer number (163200960).

Almost surely, 2^1491474782 is an apocalyptic number.

1491474782 is a deficient number, since it is larger than the sum of its proper divisors (1119740578).

1491474782 is a wasteful number, since it uses less digits than its factorization.

1491474782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2266735.

The product of its digits is 451584, while the sum is 47.

The square root of 1491474782 is about 38619.6165439275. The cubic root of 1491474782 is about 1142.5414680414.

The spelling of 1491474782 in words is "one billion, four hundred ninety-one million, four hundred seventy-four thousand, seven hundred eighty-two".