326881840 has 20 divisors (see below), whose sum is σ = 760000464. Its totient is φ = 130752704.

The previous prime is 326881817. The next prime is 326881843. The reversal of 326881840 is 48188623.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 326881793 and 326881802.

It is not an unprimeable number, because it can be changed into a prime (326881843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2042932 + ... + 2043091.

Almost surely, 2^326881840 is an apocalyptic number.

It is an amenable number.

326881840 is an abundant number, since it is smaller than the sum of its proper divisors (433118624).

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

326881840 is a wasteful number, since it uses less digits than its factorization.

326881840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4086036 (or 4086030 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 40.

The square root of 326881840 is about 18079.8738933655. The cubic root of 326881840 is about 688.8588854239.

The spelling of 326881840 in words is "three hundred twenty-six million, eight hundred eighty-one thousand, eight hundred forty".