1899358436 has 12 divisors (see below), whose sum is σ = 3335223612. Its totient is φ = 946437408.

The previous prime is 1899358421. The next prime is 1899358459. The reversal of 1899358436 is 6348539981.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1046134336 + 853224100 = 32344^2 + 29210^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 809135 + ... + 811478.

It is an arithmetic number, because the mean of its divisors is an integer number (277935301).

Almost surely, 2^1899358436 is an apocalyptic number.

It is an amenable number.

1899358436 is a deficient number, since it is larger than the sum of its proper divisors (1435865176).

1899358436 is a wasteful number, since it uses less digits than its factorization.

1899358436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1620910 (or 1620908 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 56.

The square root of 1899358436 is about 43581.6295702673. The cubic root of 1899358436 is about 1238.4229074447.

The spelling of 1899358436 in words is "one billion, eight hundred ninety-nine million, three hundred fifty-eight thousand, four hundred thirty-six".