2287720944 has 120 divisors (see below), whose sum is σ = 6750630432. Its totient is φ = 721797120.

The previous prime is 2287720943. The next prime is 2287720951. The reversal of 2287720944 is 4490277822.

2287720944 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2287720944² = 10467334235232502272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2287720944.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2287720943) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 317704 + ... + 324824.

Almost surely, 2^2287720944 is an apocalyptic number.

2287720944 is a gapful number since it is divisible by the number (24) 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 2287720944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3375315216).

2287720944 is an abundant number, since it is smaller than the sum of its proper divisors (4462909488).

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

2287720944 is a wasteful number, since it uses less digits than its factorization.

2287720944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7255 (or 7246 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 45.

The square root of 2287720944 is about 47830.1259040785. The cubic root of 2287720944 is about 1317.6528813562.

The spelling of 2287720944 in words is "two billion, two hundred eighty-seven million, seven hundred twenty thousand, nine hundred forty-four".