42508810 has 16 divisors (see below), whose sum is σ = 76690152. Its totient is φ = 16964800.

The previous prime is 42508799. The next prime is 42508847. The reversal of 42508810 is 1880524.

42508810 is a nontrivial binomial coefficient, being equal to C(9221, 2).

It can be written as a sum of positive squares in 4 ways, for example, as 38576521 + 3932289 = 6211^2 + 1983^2 .

It is a super-2 number, since 2×42508810² = 3613997855232200, which contains 22 as substring.

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, 1 + ... + 9220.

Almost surely, 2^42508810 is an apocalyptic number.

42508810 is the 9220-th triangular number.

42508810 is the 3074-th centered nonagonal number.

42508810 is a deficient number, since it is larger than the sum of its proper divisors (34181342).

42508810 is a wasteful number, since it uses less digits than its factorization.

42508810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9689.

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 42508810 is about 6519.8780663445. The cubic root of 42508810 is about 349.0007142784. Note that the first 3 decimals are identical.

The spelling of 42508810 in words is "forty-two million, five hundred eight thousand, eight hundred ten".