2197740 has 24 divisors (see below), whose sum is σ = 6153840. Its totient is φ = 586048.

The previous prime is 2197739. The next prime is 2197747. The reversal of 2197740 is 477912.

It is a super-2 number, since 2×2197740² = 9660122215200, which contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 2197698 and 2197707.

It is not an unprimeable number, because it can be changed into a prime (2197747) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18255 + ... + 18374.

It is an arithmetic number, because the mean of its divisors is an integer number (256410).

2^2197740 is an apocalyptic number.

2197740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2197740 is an abundant number, since it is smaller than the sum of its proper divisors (3956100).

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

2197740 is a wasteful number, since it uses less digits than its factorization.

2197740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36641 (or 36639 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 30.

The square root of 2197740 is about 1482.4776558181. The cubic root of 2197740 is about 130.0145940223.

The spelling of 2197740 in words is "two million, one hundred ninety-seven thousand, seven hundred forty".