42639140 has 24 divisors (see below), whose sum is σ = 89884032. Its totient is φ = 16990560.

The previous prime is 42639119. The next prime is 42639151. The reversal of 42639140 is 4193624.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1487 + ... + 9353.

It is an arithmetic number, because the mean of its divisors is an integer number (3745168).

Almost surely, 2^42639140 is an apocalyptic number.

It is an amenable number.

42639140 is an abundant number, since it is smaller than the sum of its proper divisors (47244892).

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

42639140 is a wasteful number, since it uses less digits than its factorization.

42639140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8147 (or 8145 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 42639140 is about 6529.8652359754. The cubic root of 42639140 is about 349.3570236088.

The spelling of 42639140 in words is "forty-two million, six hundred thirty-nine thousand, one hundred forty".