108421816 has 32 divisors (see below), whose sum is σ = 214151040. Its totient is φ = 51359968.

The previous prime is 108421811. The next prime is 108421823. The reversal of 108421816 is 618124801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (108421811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16935 + ... + 22441.

It is an arithmetic number, because the mean of its divisors is an integer number (6692220).

Almost surely, 2^108421816 is an apocalyptic number.

It is an amenable number.

108421816 is a deficient number, since it is larger than the sum of its proper divisors (105729224).

108421816 is a wasteful number, since it uses less digits than its factorization.

108421816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5643 (or 5639 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 31.

The square root of 108421816 is about 10412.5796995749. The cubic root of 108421816 is about 476.8395019860.

The spelling of 108421816 in words is "one hundred eight million, four hundred twenty-one thousand, eight hundred sixteen".