42639460 has 24 divisors (see below), whose sum is σ = 90679680. Its totient is φ = 16839264.

The previous prime is 42639449. The next prime is 42639461. The reversal of 42639460 is 6493624.

It is not an unprimeable number, because it can be changed into a prime (42639461) 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, 11914 + ... + 15073.

It is an arithmetic number, because the mean of its divisors is an integer number (3778320).

Almost surely, 2^42639460 is an apocalyptic number.

It is an amenable number.

42639460 is an abundant number, since it is smaller than the sum of its proper divisors (48040220).

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

42639460 is a wasteful number, since it uses less digits than its factorization.

42639460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27075 (or 27073 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 34.

The square root of 42639460 is about 6529.8897387322. The cubic root of 42639460 is about 349.3578975630.

The spelling of 42639460 in words is "forty-two million, six hundred thirty-nine thousand, four hundred sixty".