78020265 has 16 divisors (see below), whose sum is σ = 125313408. Its totient is φ = 41450496.

The previous prime is 78020263. The next prime is 78020269. The reversal of 78020265 is 56202087.

It is not a de Polignac number, because 78020265 - 2¹ = 78020263 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78020263) 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, 5944 + ... + 13833.

It is an arithmetic number, because the mean of its divisors is an integer number (7832088).

Almost surely, 2^78020265 is an apocalyptic number.

It is an amenable number.

78020265 is a deficient number, since it is larger than the sum of its proper divisors (47293143).

78020265 is a wasteful number, since it uses less digits than its factorization.

78020265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20048.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 78020265 is about 8832.9080715243. The cubic root of 78020265 is about 427.3028672855.

The spelling of 78020265 in words is "seventy-eight million, twenty thousand, two hundred sixty-five".