42905810 has 32 divisors (see below), whose sum is σ = 81430272. Its totient is φ = 16244800.

The previous prime is 42905809. The next prime is 42905813. The reversal of 42905810 is 1850924.

It is a super-2 number, since 2×42905810² = 3681817063512200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42905813) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22307 + ... + 24153.

It is an arithmetic number, because the mean of its divisors is an integer number (2544696).

Almost surely, 2^42905810 is an apocalyptic number.

42905810 is a deficient number, since it is larger than the sum of its proper divisors (38524462).

42905810 is a wasteful number, since it uses less digits than its factorization.

42905810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1978.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 42905810 is about 6550.2526668824. The cubic root of 42905810 is about 350.0838166610.

The spelling of 42905810 in words is "forty-two million, nine hundred five thousand, eight hundred ten".