78434152 has 8 divisors (see below), whose sum is σ = 147064050. Its totient is φ = 39217072.

The previous prime is 78434149. The next prime is 78434179. The reversal of 78434152 is 25143487.

It can be written as a sum of positive squares in only one way, i.e., 71808676 + 6625476 = 8474^2 + 2574^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4902127 + ... + 4902142.

Almost surely, 2^78434152 is an apocalyptic number.

It is an amenable number.

78434152 is a deficient number, since it is larger than the sum of its proper divisors (68629898).

78434152 is a wasteful number, since it uses less digits than its factorization.

78434152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9804275 (or 9804271 counting only the distinct ones).

The product of its digits is 26880, while the sum is 34.

The square root of 78434152 is about 8856.3057761123. The cubic root of 78434152 is about 428.0571298241.

The spelling of 78434152 in words is "seventy-eight million, four hundred thirty-four thousand, one hundred fifty-two".