2197788 has 24 divisors (see below), whose sum is σ = 5351808. Its totient is φ = 700656.

The previous prime is 2197781. The next prime is 2197799. The reversal of 2197788 is 8877912.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2197781) 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, 3706 + ... + 4257.

It is an arithmetic number, because the mean of its divisors is an integer number (222992).

2^2197788 is an apocalyptic number.

It is an amenable number.

2197788 is an abundant number, since it is smaller than the sum of its proper divisors (3154020).

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

2197788 is a wasteful number, since it uses less digits than its factorization.

2197788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7993 (or 7991 counting only the distinct ones).

The product of its digits is 56448, while the sum is 42.

The square root of 2197788 is about 1482.4938448439. The cubic root of 2197788 is about 130.0155405485.

The spelling of 2197788 in words is "two million, one hundred ninety-seven thousand, seven hundred eighty-eight".