227640 has 64 divisors (see below), whose sum is σ = 783360. Its totient is φ = 51840.

The previous prime is 227629. The next prime is 227651. The reversal of 227640 is 46722.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (227629) and next prime (227651).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 705 + ... + 975.

It is an arithmetic number, because the mean of its divisors is an integer number (12240).

2²²⁷⁶⁴⁰ is an apocalyptic number.

227640 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 227640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (391680).

227640 is an abundant number, since it is smaller than the sum of its proper divisors (555720).

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

227640 is a wasteful number, since it uses less digits than its factorization.

227640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292 (or 288 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 227640 is about 477.1163380141. The cubic root of 227640 is about 61.0589772698.

The spelling of 227640 in words is "two hundred twenty-seven thousand, six hundred forty".