78256953 has 12 divisors (see below), whose sum is σ = 118987440. Its totient is φ = 49425336.

The previous prime is 78256943. The next prime is 78256963. The reversal of 78256953 is 35965287.

It is a happy number.

78256953 is a `hidden beast` number, since 7 + 82 + 569 + 5 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (78256943) and next prime (78256963).

It is not a de Polignac number, because 78256953 - 2⁶ = 78256889 is a prime.

It is a super-2 number, since 2×78256953² = 12248301385688418, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 78256899 and 78256908.

It is not an unprimeable number, because it can be changed into a prime (78256903) 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 11 ways as a sum of consecutive naturals, for example, 228651 + ... + 228992.

It is an arithmetic number, because the mean of its divisors is an integer number (9915620).

Almost surely, 2^78256953 is an apocalyptic number.

It is an amenable number.

78256953 is a deficient number, since it is larger than the sum of its proper divisors (40730487).

78256953 is a wasteful number, since it uses less digits than its factorization.

78256953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457668 (or 457665 counting only the distinct ones).

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

The square root of 78256953 is about 8846.2960045434. The cubic root of 78256953 is about 427.7345301806.

The spelling of 78256953 in words is "seventy-eight million, two hundred fifty-six thousand, nine hundred fifty-three".