1997200040 has 32 divisors (see below), whose sum is σ = 4902219360. Its totient is φ = 726254400.

The previous prime is 1997200039. The next prime is 1997200061. The reversal of 1997200040 is 400027991.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2269106 + ... + 2269985.

It is an arithmetic number, because the mean of its divisors is an integer number (153194355).

Almost surely, 2^1997200040 is an apocalyptic number.

1997200040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1997200040 is an abundant number, since it is smaller than the sum of its proper divisors (2905019320).

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

1997200040 is a wasteful number, since it uses less digits than its factorization.

1997200040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4539113 (or 4539109 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 1997200040 is about 44690.0440814282. The cubic root of 1997200040 is about 1259.3328205492.

The spelling of 1997200040 in words is "one billion, nine hundred ninety-seven million, two hundred thousand, forty".