1998970 has 32 divisors (see below), whose sum is σ = 3816720. Its totient is φ = 752640.

The previous prime is 1998961. The next prime is 1998977. The reversal of 1998970 is 798991.

It can be written as a sum of positive squares in 8 ways, for example, as 19321 + 1979649 = 139^2 + 1407^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1998977) 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, 17634 + ... + 17746.

2^1998970 is an apocalyptic number.

1998970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1998970 is a deficient number, since it is larger than the sum of its proper divisors (1817750).

1998970 is a wasteful number, since it uses less digits than its factorization.

1998970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210.

The product of its (nonzero) digits is 40824, while the sum is 43.

The square root of 1998970 is about 1413.8493554831. The cubic root of 1998970 is about 125.9704726308.

It can be divided in two parts, 19 and 98970, that added together give a palindrome (98989).

The spelling of 1998970 in words is "one million, nine hundred ninety-eight thousand, nine hundred seventy".