1490398805 has 16 divisors (see below), whose sum is σ = 2044833024. Its totient is φ = 1021559040.

The previous prime is 1490398801. The next prime is 1490398837. The reversal of 1490398805 is 5088930941.

It is not a de Polignac number, because 1490398805 - 2² = 1490398801 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1490398805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1490398801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91640 + ... + 106670.

It is an arithmetic number, because the mean of its divisors is an integer number (127802064).

Almost surely, 2^1490398805 is an apocalyptic number.

It is an amenable number.

1490398805 is a deficient number, since it is larger than the sum of its proper divisors (554434219).

1490398805 is a wasteful number, since it uses less digits than its factorization.

1490398805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17876.

The product of its (nonzero) digits is 311040, while the sum is 47.

The square root of 1490398805 is about 38605.6835841564. The cubic root of 1490398805 is about 1142.2666518887.

The spelling of 1490398805 in words is "one billion, four hundred ninety million, three hundred ninety-eight thousand, eight hundred five".