1898465538 has 16 divisors (see below), whose sum is σ = 3861286560. Its totient is φ = 622095936.

The previous prime is 1898465533. The next prime is 1898465561. The reversal of 1898465538 is 8355648981.

It is not an unprimeable number, because it can be changed into a prime (1898465533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2681095 + ... + 2681802.

It is an arithmetic number, because the mean of its divisors is an integer number (241330410).

Almost surely, 2^1898465538 is an apocalyptic number.

1898465538 is an abundant number, since it is smaller than the sum of its proper divisors (1962821022).

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

1898465538 is a wasteful number, since it uses less digits than its factorization.

1898465538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5362961.

The product of its digits is 8294400, while the sum is 57.

The square root of 1898465538 is about 43571.3843938886. The cubic root of 1898465538 is about 1238.2288140708.

The spelling of 1898465538 in words is "one billion, eight hundred ninety-eight million, four hundred sixty-five thousand, five hundred thirty-eight".