328722840 has 64 divisors (see below), whose sum is σ = 1095746400. Its totient is φ = 87659136.

The previous prime is 328722827. The next prime is 328722881. The reversal of 328722840 is 48227823.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 328722795 and 328722804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 151107 + ... + 153266.

Almost surely, 2^328722840 is an apocalyptic number.

328722840 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

328722840 is an abundant number, since it is smaller than the sum of its proper divisors (767023560).

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

328722840 is a wasteful number, since it uses less digits than its factorization.

328722840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304393 (or 304383 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The square root of 328722840 is about 18130.7153747446. The cubic root of 328722840 is about 690.1496839723.

The spelling of 328722840 in words is "three hundred twenty-eight million, seven hundred twenty-two thousand, eight hundred forty".