1898180949 has 16 divisors (see below), whose sum is σ = 2959734272. Its totient is φ = 1059449328.

The previous prime is 1898180929. The next prime is 1898180957. The reversal of 1898180949 is 9490818981.

It is not a de Polignac number, because 1898180949 - 2²⁷ = 1763963221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1898180909) 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, 1050139 + ... + 1051944.

It is an arithmetic number, because the mean of its divisors is an integer number (184983392).

Almost surely, 2^1898180949 is an apocalyptic number.

It is an amenable number.

1898180949 is a deficient number, since it is larger than the sum of its proper divisors (1061553323).

1898180949 is a wasteful number, since it uses less digits than its factorization.

1898180949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2102136.

The product of its (nonzero) digits is 1492992, while the sum is 57.

The square root of 1898180949 is about 43568.1184927695. The cubic root of 1898180949 is about 1238.1669388524.

The spelling of 1898180949 in words is "one billion, eight hundred ninety-eight million, one hundred eighty thousand, nine hundred forty-nine".