78623432 has 8 divisors (see below), whose sum is σ = 147418950. Its totient is φ = 39311712.

The previous prime is 78623429. The next prime is 78623443. The reversal of 78623432 is 23432687.

It can be written as a sum of positive squares in only one way, i.e., 54081316 + 24542116 = 7354^2 + 4954^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 78623392 and 78623401.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4913957 + ... + 4913972.

Almost surely, 2^78623432 is an apocalyptic number.

It is an amenable number.

78623432 is a deficient number, since it is larger than the sum of its proper divisors (68795518).

78623432 is a wasteful number, since it uses less digits than its factorization.

78623432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9827935 (or 9827931 counting only the distinct ones).

The product of its digits is 48384, while the sum is 35.

The square root of 78623432 is about 8866.9855080518. The cubic root of 78623432 is about 428.4011872835.

The spelling of 78623432 in words is "seventy-eight million, six hundred twenty-three thousand, four hundred thirty-two".