320040540 has 36 divisors (see below), whose sum is σ = 970790184. Its totient is φ = 85344096.

The previous prime is 320040533. The next prime is 320040569. The reversal of 320040540 is 45040023.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 888822 + ... + 889181.

It is an arithmetic number, because the mean of its divisors is an integer number (26966394).

Almost surely, 2^320040540 is an apocalyptic number.

320040540 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

320040540 is an abundant number, since it is smaller than the sum of its proper divisors (650749644).

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

320040540 is a wasteful number, since it uses less digits than its factorization.

320040540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1778018 (or 1778013 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 320040540 is about 17889.6769115599. The cubic root of 320040540 is about 684.0192617947.

Adding to 320040540 its reverse (45040023), we get a palindrome (365080563).

The spelling of 320040540 in words is "three hundred twenty million, forty thousand, five hundred forty".