227640140 has 192 divisors, whose sum is σ = 643507200. Its totient is φ = 65608704.

The previous prime is 227640139. The next prime is 227640143. The reversal of 227640140 is 41046722.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (227640143) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1002707 + ... + 1002933.

It is an arithmetic number, because the mean of its divisors is an integer number (3351600).

Almost surely, 2^227640140 is an apocalyptic number.

227640140 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 227640140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (321753600).

227640140 is an abundant number, since it is smaller than the sum of its proper divisors (415867060).

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

227640140 is a wasteful number, since it uses less digits than its factorization.

227640140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304 (or 302 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 227640140 is about 15087.7480095606. The cubic root of 227640140 is about 610.5898978700.

Adding to 227640140 its reverse (41046722), we get a palindrome (268686862).

The spelling of 227640140 in words is "two hundred twenty-seven million, six hundred forty thousand, one hundred forty".