320607878 has 4 divisors (see below), whose sum is σ = 480911820. Its totient is φ = 160303938.

The previous prime is 320607877. The next prime is 320607899. The reversal of 320607878 is 878706023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 878706023 = 13 ⋅67592771.

It is a super-2 number, since 2×320607878² = 205578822871325768, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320607877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80151968 + ... + 80151971.

It is an arithmetic number, because the mean of its divisors is an integer number (120227955).

Almost surely, 2^320607878 is an apocalyptic number.

320607878 is a deficient number, since it is larger than the sum of its proper divisors (160303942).

320607878 is a wasteful number, since it uses less digits than its factorization.

320607878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160303941.

The product of its (nonzero) digits is 112896, while the sum is 41.

The square root of 320607878 is about 17905.5264653123. The cubic root of 320607878 is about 684.4232116964.

The spelling of 320607878 in words is "three hundred twenty million, six hundred seven thousand, eight hundred seventy-eight".