42661444 has 24 divisors (see below), whose sum is σ = 87631040. Its totient is φ = 17788896.

The previous prime is 42661439. The next prime is 42661447. The reversal of 42661444 is 44416624.

It is not an unprimeable number, because it can be changed into a prime (42661447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19554 + ... + 21625.

Almost surely, 2^42661444 is an apocalyptic number.

It is an amenable number.

42661444 is an abundant number, since it is smaller than the sum of its proper divisors (44969596).

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

42661444 is a wasteful number, since it uses less digits than its factorization.

42661444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41227 (or 41225 counting only the distinct ones).

The product of its digits is 18432, while the sum is 31.

The square root of 42661444 is about 6531.5728580488. The cubic root of 42661444 is about 349.4179277516.

The spelling of 42661444 in words is "forty-two million, six hundred sixty-one thousand, four hundred forty-four".