42707818 has 8 divisors (see below), whose sum is σ = 64432548. Its totient is φ = 21230304.

The previous prime is 42707779. The next prime is 42707831. The reversal of 42707818 is 81870724.

It can be written as a sum of positive squares in 2 ways, for example, as 38775529 + 3932289 = 6227^2 + 1983^2 .

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

It is a super-2 number, since 2×42707818² = 3647915436642248, which contains 22 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, 61371 + ... + 62062.

Almost surely, 2^42707818 is an apocalyptic number.

42707818 is a deficient number, since it is larger than the sum of its proper divisors (21724730).

42707818 is a wasteful number, since it uses less digits than its factorization.

42707818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123608.

The product of its (nonzero) digits is 25088, while the sum is 37.

The square root of 42707818 is about 6535.1218810363. The cubic root of 42707818 is about 349.5444904247.

The spelling of 42707818 in words is "forty-two million, seven hundred seven thousand, eight hundred eighteen".