78265953 has 8 divisors (see below), whose sum is σ = 115949600. Its totient is φ = 52177284.

The previous prime is 78265903. The next prime is 78265961. The reversal of 78265953 is 35956287.

It is a happy number.

It is not a de Polignac number, because 78265953 - 2⁹ = 78265441 is a prime.

It is a super-2 number, since 2×78265953² = 12251118797996418, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78265899 and 78265908.

It is not an unprimeable number, because it can be changed into a prime (78265903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1449343 + ... + 1449396.

It is an arithmetic number, because the mean of its divisors is an integer number (14493700).

Almost surely, 2^78265953 is an apocalyptic number.

It is an amenable number.

78265953 is a deficient number, since it is larger than the sum of its proper divisors (37683647).

78265953 is a wasteful number, since it uses less digits than its factorization.

78265953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2898748 (or 2898742 counting only the distinct ones).

The product of its digits is 453600, while the sum is 45.

The square root of 78265953 is about 8846.8046773962. The cubic root of 78265953 is about 427.7509268630.

The spelling of 78265953 in words is "seventy-eight million, two hundred sixty-five thousand, nine hundred fifty-three".