42064340 has 36 divisors (see below), whose sum is σ = 89732916. Its totient is φ = 16563456.

The previous prime is 42064331. The next prime is 42064357. The reversal of 42064340 is 4346024.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 13205956 + 28858384 = 3634^2 + 5372^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 124652 + ... + 124988.

It is an arithmetic number, because the mean of its divisors is an integer number (2492581).

Almost surely, 2^42064340 is an apocalyptic number.

It is an amenable number.

42064340 is an abundant number, since it is smaller than the sum of its proper divisors (47668576).

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

42064340 is a wasteful number, since it uses less digits than its factorization.

42064340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504 (or 423 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 42064340 is about 6485.7027375605. The cubic root of 42064340 is about 347.7800719880.

The spelling of 42064340 in words is "forty-two million, sixty-four thousand, three hundred forty".