320604642 has 40 divisors (see below), whose sum is σ = 724094976. Its totient is φ = 106019928.

The previous prime is 320604637. The next prime is 320604677. The reversal of 320604642 is 246406023.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 12783 + ... + 28365.

Almost surely, 2^320604642 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 320604642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (362047488).

320604642 is an abundant number, since it is smaller than the sum of its proper divisors (403490334).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

320604642 is a wasteful number, since it uses less digits than its factorization.

320604642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15724 (or 15715 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 320604642 is about 17905.4361019217. The cubic root of 320604642 is about 684.4209089863.

The spelling of 320604642 in words is "three hundred twenty million, six hundred four thousand, six hundred forty-two".