78429332 has 6 divisors (see below), whose sum is σ = 137251338. Its totient is φ = 39214664.

The previous prime is 78429319. The next prime is 78429341. The reversal of 78429332 is 23392487.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 57214096 + 21215236 = 7564^2 + 4606^2 .

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 9803663 + ... + 9803670.

It is an arithmetic number, because the mean of its divisors is an integer number (22875223).

Almost surely, 2^78429332 is an apocalyptic number.

It is an amenable number.

78429332 is a deficient number, since it is larger than the sum of its proper divisors (58822006).

78429332 is a wasteful number, since it uses less digits than its factorization.

78429332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19607337 (or 19607335 counting only the distinct ones).

The product of its digits is 72576, while the sum is 38.

The square root of 78429332 is about 8856.0336494392. The cubic root of 78429332 is about 428.0483612049.

The spelling of 78429332 in words is "seventy-eight million, four hundred twenty-nine thousand, three hundred thirty-two".