42408290 has 16 divisors (see below), whose sum is σ = 78398712. Its totient is φ = 16504704.

The previous prime is 42408283. The next prime is 42408307. The reversal of 42408290 is 9280424.

It can be written as a sum of positive squares in 4 ways, for example, as 38725729 + 3682561 = 6223^2 + 1919^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56939 + ... + 57678.

Almost surely, 2^42408290 is an apocalyptic number.

42408290 is a deficient number, since it is larger than the sum of its proper divisors (35990422).

42408290 is a wasteful number, since it uses less digits than its factorization.

42408290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114661.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 42408290 is about 6512.1647706427. The cubic root of 42408290 is about 348.7254047565.

It can be divided in two parts, 42408 and 290, that multiplied together give a triangular number (12298320 = T₄₉₅₉).

The spelling of 42408290 in words is "forty-two million, four hundred eight thousand, two hundred ninety".