72441820 has 24 divisors (see below), whose sum is σ = 165958128. Its totient is φ = 26342400.

The previous prime is 72441779. The next prime is 72441827. The reversal of 72441820 is 2814427.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72441827) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164421 + ... + 164860.

It is an arithmetic number, because the mean of its divisors is an integer number (6914922).

Almost surely, 2^72441820 is an apocalyptic number.

It is an amenable number.

72441820 is an abundant number, since it is smaller than the sum of its proper divisors (93516308).

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

72441820 is a wasteful number, since it uses less digits than its factorization.

72441820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329301 (or 329299 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 72441820 is about 8511.2760500409. The cubic root of 72441820 is about 416.8659768237.

The spelling of 72441820 in words is "seventy-two million, four hundred forty-one thousand, eight hundred twenty".