42688090 has 8 divisors (see below), whose sum is σ = 76838580. Its totient is φ = 17075232.

The previous prime is 42688057. The next prime is 42688109. The reversal of 42688090 is 9088624.

It can be written as a sum of positive squares in 2 ways, for example, as 41977441 + 710649 = 6479^2 + 843^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×42688090³ (a number of 24 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2134395 + ... + 2134414.

Almost surely, 2^42688090 is an apocalyptic number.

42688090 is a deficient number, since it is larger than the sum of its proper divisors (34150490).

42688090 is a wasteful number, since it uses less digits than its factorization.

42688090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4268816.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 42688090 is about 6533.6123239752. The cubic root of 42688090 is about 349.4906605009.

The spelling of 42688090 in words is "forty-two million, six hundred eighty-eight thousand, ninety".