1997310 has 32 divisors (see below), whose sum is σ = 5478912. Its totient is φ = 456480.

The previous prime is 1997293. The next prime is 1997311. The reversal of 1997310 is 137991.

It is a super-2 number, since 2×1997310² = 7978494472200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1997311) 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, 4546 + ... + 4965.

It is an arithmetic number, because the mean of its divisors is an integer number (171216).

2^1997310 is an apocalyptic number.

1997310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1997310 is an abundant number, since it is smaller than the sum of its proper divisors (3481602).

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

1997310 is a wasteful number, since it uses less digits than its factorization.

1997310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9528.

The product of its (nonzero) digits is 1701, while the sum is 30.

The square root of 1997310 is about 1413.2621837437. The cubic root of 1997310 is about 125.9355931854.

The spelling of 1997310 in words is "one million, nine hundred ninety-seven thousand, three hundred ten".