42090698 has 16 divisors (see below), whose sum is σ = 68108040. Its totient is φ = 19393536.

The previous prime is 42090649. The next prime is 42090701. The reversal of 42090698 is 89609024.

It can be written as a sum of positive squares in 4 ways, for example, as 37368769 + 4721929 = 6113^2 + 2173^2 .

It is a Curzon number.

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, 21338 + ... + 23226.

Almost surely, 2^42090698 is an apocalyptic number.

42090698 is a deficient number, since it is larger than the sum of its proper divisors (26017342).

42090698 is a wasteful number, since it uses less digits than its factorization.

42090698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2761.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 42090698 is about 6487.7344273637. The cubic root of 42090698 is about 347.8526978205.

The spelling of 42090698 in words is "forty-two million, ninety thousand, six hundred ninety-eight".