2209893840 has 800 divisors, whose sum is σ = 9886795776. Its totient is φ = 444165120.

The previous prime is 2209893839. The next prime is 2209893899. The reversal of 2209893840 is 483989022.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 21455229 + ... + 21455331.

Almost surely, 2^2209893840 is an apocalyptic number.

2209893840 is a gapful number since it is divisible by the number (20) 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 2209893840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4943397888).

2209893840 is an abundant number, since it is smaller than the sum of its proper divisors (7676901936).

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

2209893840 is a wasteful number, since it uses less digits than its factorization.

2209893840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189 (or 174 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 2209893840 is about 47009.5079744513. The cubic root of 2209893840 is about 1302.5382047264.

The spelling of 2209893840 in words is "two billion, two hundred nine million, eight hundred ninety-three thousand, eight hundred forty".