1988199162 has 64 divisors (see below), whose sum is σ = 4491456000. Its totient is φ = 651815424.

The previous prime is 1988199137. The next prime is 1988199163. The reversal of 1988199162 is 2619918891.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 1988199099 and 1988199108.

It is not an unprimeable number, because it can be changed into a prime (1988199163) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1334514 + ... + 1336002.

It is an arithmetic number, because the mean of its divisors is an integer number (70179000).

Almost surely, 2^1988199162 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1988199162, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2245728000).

1988199162 is an abundant number, since it is smaller than the sum of its proper divisors (2503256838).

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

1988199162 is a wasteful number, since it uses less digits than its factorization.

1988199162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1892 (or 1886 counting only the distinct ones).

The product of its digits is 559872, while the sum is 54.

The square root of 1988199162 is about 44589.2269724426. The cubic root of 1988199162 is about 1257.4381393682.

The spelling of 1988199162 in words is "one billion, nine hundred eighty-eight million, one hundred ninety-nine thousand, one hundred sixty-two".