73140656 has 40 divisors (see below), whose sum is σ = 147323904. Its totient is φ = 35138880.

The previous prime is 73140643. The next prime is 73140677. The reversal of 73140656 is 65604137.

73140656 = 1521² + 1522² + ... + 1551².

It is a super-2 number, since 2×73140656² = 10699111120220672, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82391 + ... + 83273.

Almost surely, 2^73140656 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 73140656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73661952).

73140656 is an abundant number, since it is smaller than the sum of its proper divisors (74183248).

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

73140656 is a wasteful number, since it uses less digits than its factorization.

73140656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1089 (or 1083 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 73140656 is about 8552.2310539414. The cubic root of 73140656 is about 418.2021716851.

The spelling of 73140656 in words is "seventy-three million, one hundred forty thousand, six hundred fifty-six".