72361540 has 12 divisors (see below), whose sum is σ = 151959276. Its totient is φ = 28944608.

The previous prime is 72361511. The next prime is 72361559. The reversal of 72361540 is 4516327.

It can be written as a sum of positive squares in 2 ways, for example, as 32444416 + 39917124 = 5696^2 + 6318^2 .

It is a junction number, because it is equal to n+sod(n) for n = 72361499 and 72361508.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1809019 + ... + 1809058.

It is an arithmetic number, because the mean of its divisors is an integer number (12663273).

Almost surely, 2^72361540 is an apocalyptic number.

It is an amenable number.

72361540 is an abundant number, since it is smaller than the sum of its proper divisors (79597736).

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

72361540 is a wasteful number, since it uses less digits than its factorization.

72361540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3618086 (or 3618084 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 72361540 is about 8506.5586461271. The cubic root of 72361540 is about 416.7119296606.

Adding to 72361540 its reverse (4516327), we get a palindrome (76877867).

The spelling of 72361540 in words is "seventy-two million, three hundred sixty-one thousand, five hundred forty".