42270660 has 120 divisors (see below), whose sum is σ = 134469720. Its totient is φ = 11114496.

The previous prime is 42270643. The next prime is 42270673. The reversal of 42270660 is 6607224.

It can be written as a sum of positive squares in 4 ways, for example, as 46656 + 42224004 = 216^2 + 6498^2 .

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 157006 + ... + 157274.

It is an arithmetic number, because the mean of its divisors is an integer number (1120581).

Almost surely, 2^42270660 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 42270660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67234860).

42270660 is an abundant number, since it is smaller than the sum of its proper divisors (92199060).

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

42270660 is a wasteful number, since it uses less digits than its factorization.

42270660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387 (or 376 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 42270660 is about 6501.5890365356. The cubic root of 42270660 is about 348.3477498873.

Adding to 42270660 its reverse (6607224), we get a palindrome (48877884).

The spelling of 42270660 in words is "forty-two million, two hundred seventy thousand, six hundred sixty".