73640772 has 48 divisors (see below), whose sum is σ = 193789120. Its totient is φ = 24178176.

The previous prime is 73640771. The next prime is 73640783. The reversal of 73640772 is 27704637.

73640772 is a `hidden beast` number, since 7 + 3 + 640 + 7 + 7 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (73640771) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2148 + ... + 12324.

Almost surely, 2^73640772 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 73640772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96894560).

73640772 is an abundant number, since it is smaller than the sum of its proper divisors (120148348).

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

73640772 is a wasteful number, since it uses less digits than its factorization.

73640772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10257 (or 10249 counting only the distinct ones).

The product of its (nonzero) digits is 49392, while the sum is 36.

The square root of 73640772 is about 8581.4201621876. The cubic root of 73640772 is about 419.1531917633.

The spelling of 73640772 in words is "seventy-three million, six hundred forty thousand, seven hundred seventy-two".