1491290404 has 12 divisors (see below), whose sum is σ = 2620960524. Its totient is φ = 742444544.

The previous prime is 1491290389. The next prime is 1491290413. The reversal of 1491290404 is 4040921941.

It can be written as a sum of positive squares in 2 ways, for example, as 1029126400 + 462164004 = 32080^2 + 21498^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1491290404.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 799117 + ... + 800980.

It is an arithmetic number, because the mean of its divisors is an integer number (218413377).

Almost surely, 2^1491290404 is an apocalyptic number.

It is an amenable number.

1491290404 is a deficient number, since it is larger than the sum of its proper divisors (1129670120).

1491290404 is a wasteful number, since it uses less digits than its factorization.

1491290404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1600334 (or 1600332 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 1491290404 is about 38617.2293672138. The cubic root of 1491290404 is about 1142.4943852939.

The spelling of 1491290404 in words is "one billion, four hundred ninety-one million, two hundred ninety thousand, four hundred four".