72889320 has 128 divisors (see below), whose sum is σ = 263116800. Its totient is φ = 15780096.

The previous prime is 72889283. The next prime is 72889331. The reversal of 72889320 is 2398827.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13677 + ... + 18243.

It is an arithmetic number, because the mean of its divisors is an integer number (2055600).

Almost surely, 2^72889320 is an apocalyptic number.

72889320 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72889320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131558400).

72889320 is an abundant number, since it is smaller than the sum of its proper divisors (190227480).

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

72889320 is a wasteful number, since it uses less digits than its factorization.

72889320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4607 (or 4603 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 72889320 is about 8537.5242312980. The cubic root of 72889320 is about 417.7225939594.

The spelling of 72889320 in words is "seventy-two million, eight hundred eighty-nine thousand, three hundred twenty".