1898233155 has 48 divisors (see below), whose sum is σ = 4049572800. Its totient is φ = 801010944.

The previous prime is 1898233153. The next prime is 1898233159. The reversal of 1898233155 is 5513328981.

It is not a de Polignac number, because 1898233155 - 2¹ = 1898233153 is a prime.

It is a super-2 number, since 2×1898233155² = 7206578221482508050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1898233155.

It is not an unprimeable number, because it can be changed into a prime (1898233153) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 227680 + ... + 235869.

It is an arithmetic number, because the mean of its divisors is an integer number (84366100).

Almost surely, 2^1898233155 is an apocalyptic number.

1898233155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1898233155 is an abundant number, since it is smaller than the sum of its proper divisors (2151339645).

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

1898233155 is a wasteful number, since it uses less digits than its factorization.

1898233155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463580 (or 463577 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The square root of 1898233155 is about 43568.7176194113. The cubic root of 1898233155 is about 1238.1782899217.

The spelling of 1898233155 in words is "one billion, eight hundred ninety-eight million, two hundred thirty-three thousand, one hundred fifty-five".