72024577 has 4 divisors (see below), whose sum is σ = 73781316. Its totient is φ = 70267840.

The previous prime is 72024553. The next prime is 72024581. The reversal of 72024577 is 77542027.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 40653376 + 31371201 = 6376^2 + 5601^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72024577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72024587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 878308 + ... + 878389.

It is an arithmetic number, because the mean of its divisors is an integer number (18445329).

Almost surely, 2^72024577 is an apocalyptic number.

It is an amenable number.

72024577 is a deficient number, since it is larger than the sum of its proper divisors (1756739).

72024577 is a wasteful number, since it uses less digits than its factorization.

72024577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1756738.

The product of its (nonzero) digits is 27440, while the sum is 34.

The square root of 72024577 is about 8486.7294642872. The cubic root of 72024577 is about 416.0640946145.

The spelling of 72024577 in words is "seventy-two million, twenty-four thousand, five hundred seventy-seven".