2220640156 has 48 divisors (see below), whose sum is σ = 4646476800. Its totient is φ = 907948800.

The previous prime is 2220640141. The next prime is 2220640159. The reversal of 2220640156 is 6510460222.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2220640159) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 253945 + ... + 262543.

It is an arithmetic number, because the mean of its divisors is an integer number (96801600).

Almost surely, 2^2220640156 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2220640156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2323238400).

2220640156 is an abundant number, since it is smaller than the sum of its proper divisors (2425836644).

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

2220640156 is a wasteful number, since it uses less digits than its factorization.

2220640156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9034 (or 9032 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 2220640156 is about 47123.6687451221. The cubic root of 2220640156 is about 1304.6461278777.

The spelling of 2220640156 in words is "two billion, two hundred twenty million, six hundred forty thousand, one hundred fifty-six".