1898213836 has 12 divisors (see below), whose sum is σ = 3326267728. Its totient is φ = 947851632.

The previous prime is 1898213831. The next prime is 1898213839. The reversal of 1898213836 is 6383128981.

It is a self number, because there is not a number n which added to its sum of digits gives 1898213836.

It is not an unprimeable number, because it can be changed into a prime (1898213831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 310416 + ... + 316471.

Almost surely, 2^1898213836 is an apocalyptic number.

It is an amenable number.

1898213836 is a deficient number, since it is larger than the sum of its proper divisors (1428053892).

1898213836 is a wasteful number, since it uses less digits than its factorization.

1898213836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627648 (or 627646 counting only the distinct ones).

The product of its digits is 497664, while the sum is 49.

The square root of 1898213836 is about 43568.4959116103. The cubic root of 1898213836 is about 1238.1740894459.

The spelling of 1898213836 in words is "one billion, eight hundred ninety-eight million, two hundred thirteen thousand, eight hundred thirty-six".