2197980 has 36 divisors (see below), whose sum is σ = 6667752. Its totient is φ = 586080.

The previous prime is 2197973. The next prime is 2198003. The reversal of 2197980 is 897912.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×2197980² = 9662232160800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5926 + ... + 6285.

2^2197980 is an apocalyptic number.

2197980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2197980 is an abundant number, since it is smaller than the sum of its proper divisors (4469772).

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

2197980 is a wasteful number, since it uses less digits than its factorization.

2197980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12226 (or 12221 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 2197980 is about 1482.5585991791. The cubic root of 2197980 is about 130.0193265152.

The spelling of 2197980 in words is "two million, one hundred ninety-seven thousand, nine hundred eighty".