2277720 has 160 divisors (see below), whose sum is σ = 8276400. Its totient is φ = 559872.

The previous prime is 2277703. The next prime is 2277727. The reversal of 2277720 is 277722.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2277727) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 61542 + ... + 61578.

2^2277720 is an apocalyptic number.

2277720 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 2277720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4138200).

2277720 is an abundant number, since it is smaller than the sum of its proper divisors (5998680).

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

2277720 is a wasteful number, since it uses less digits than its factorization.

2277720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79 (or 66 counting only the distinct ones).

The product of its (nonzero) digits is 2744, while the sum is 27.

The square root of 2277720 is about 1509.2117147703. The cubic root of 2277720 is about 131.5730003768.

The spelling of 2277720 in words is "two million, two hundred seventy-seven thousand, seven hundred twenty".