42917830 has 16 divisors (see below), whose sum is σ = 77327424. Its totient is φ = 17150400.

The previous prime is 42917813. The next prime is 42917851. The reversal of 42917830 is 3871924.

It is a congruent 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, 16819 + ... + 19201.

It is an arithmetic number, because the mean of its divisors is an integer number (4832964).

Almost surely, 2^42917830 is an apocalyptic number.

42917830 is a deficient number, since it is larger than the sum of its proper divisors (34409594).

42917830 is a wasteful number, since it uses less digits than its factorization.

42917830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4191.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 42917830 is about 6551.1701244892. The cubic root of 42917830 is about 350.1165054319.

It can be divided in two parts, 4291 and 7830, that added together give a palindrome (12121).

The spelling of 42917830 in words is "forty-two million, nine hundred seventeen thousand, eight hundred thirty".