1997670 has 32 divisors (see below), whose sum is σ = 5077728. Its totient is φ = 501248.

The previous prime is 1997663. The next prime is 1997683. The reversal of 1997670 is 767991.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1449 + ... + 2468.

It is an arithmetic number, because the mean of its divisors is an integer number (158679).

2^1997670 is an apocalyptic number.

1997670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1997670 is an abundant number, since it is smaller than the sum of its proper divisors (3080058).

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

1997670 is a wasteful number, since it uses less digits than its factorization.

1997670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3944.

The product of its (nonzero) digits is 23814, while the sum is 39.

The square root of 1997670 is about 1413.3895429074. The cubic root of 1997670 is about 125.9431590431.

The spelling of 1997670 in words is "one million, nine hundred ninety-seven thousand, six hundred seventy".