2209788 has 96 divisors (see below), whose sum is σ = 6809600. Its totient is φ = 606528.

The previous prime is 2209787. The next prime is 2209789. The reversal of 2209788 is 8879022.

It is an interprime number because it is at equal distance from previous prime (2209787) and next prime (2209789).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2209787) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27933 + ... + 28011.

2^2209788 is an apocalyptic number.

2209788 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2209788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3404800).

2209788 is an abundant number, since it is smaller than the sum of its proper divisors (4599812).

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

2209788 is a wasteful number, since it uses less digits than its factorization.

2209788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136 (or 128 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 2209788 is about 1486.5355697056. The cubic root of 2209788 is about 130.2517409935.

The spelling of 2209788 in words is "two million, two hundred nine thousand, seven hundred eighty-eight".