73570640 has 160 divisors (see below), whose sum is σ = 206236800. Its totient is φ = 24053760.

The previous prime is 73570633. The next prime is 73570643. The reversal of 73570640 is 4607537.

It is a junction number, because it is equal to n+sod(n) for n = 73570597 and 73570606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73570643) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 674906 + ... + 675014.

It is an arithmetic number, because the mean of its divisors is an integer number (1288980).

Almost surely, 2^73570640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 73570640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103118400).

73570640 is an abundant number, since it is smaller than the sum of its proper divisors (132666160).

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

73570640 is a wasteful number, since it uses less digits than its factorization.

73570640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205 (or 199 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 32.

The square root of 73570640 is about 8577.3329188041. The cubic root of 73570640 is about 419.0200889201.

The spelling of 73570640 in words is "seventy-three million, five hundred seventy thousand, six hundred forty".