1899409494 has 32 divisors (see below), whose sum is σ = 3926237184. Its totient is φ = 611951040.

The previous prime is 1899409493. The next prime is 1899409531. The reversal of 1899409494 is 4949049981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1899409493) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 154602 + ... + 166434.

It is an arithmetic number, because the mean of its divisors is an integer number (122694912).

Almost surely, 2^1899409494 is an apocalyptic number.

1899409494 is an abundant number, since it is smaller than the sum of its proper divisors (2026827690).

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

1899409494 is a wasteful number, since it uses less digits than its factorization.

1899409494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12732.

The product of its (nonzero) digits is 3359232, while the sum is 57.

The square root of 1899409494 is about 43582.2153406639. The cubic root of 1899409494 is about 1238.4340043198.

The spelling of 1899409494 in words is "one billion, eight hundred ninety-nine million, four hundred nine thousand, four hundred ninety-four".