72020765 has 16 divisors (see below), whose sum is σ = 87696000. Its totient is φ = 56776512.

The previous prime is 72020713. The next prime is 72020771. The reversal of 72020765 is 56702027.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 72020765 - 2⁶ = 72020701 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119936 + ... + 120534.

It is an arithmetic number, because the mean of its divisors is an integer number (5481000).

Almost surely, 2^72020765 is an apocalyptic number.

It is an amenable number.

72020765 is a deficient number, since it is larger than the sum of its proper divisors (15675235).

72020765 is a wasteful number, since it uses less digits than its factorization.

72020765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 916.

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 72020765 is about 8486.5048753889. The cubic root of 72020765 is about 416.0567542298.

The spelling of 72020765 in words is "seventy-two million, twenty thousand, seven hundred sixty-five".