78642332 has 6 divisors (see below), whose sum is σ = 137624088. Its totient is φ = 39321164.

The previous prime is 78642331. The next prime is 78642371. The reversal of 78642332 is 23324687.

It is a junction number, because it is equal to n+sod(n) for n = 78642292 and 78642301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78642331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9830288 + ... + 9830295.

It is an arithmetic number, because the mean of its divisors is an integer number (22937348).

Almost surely, 2^78642332 is an apocalyptic number.

It is an amenable number.

78642332 is a deficient number, since it is larger than the sum of its proper divisors (58981756).

78642332 is a wasteful number, since it uses less digits than its factorization.

78642332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19660587 (or 19660585 counting only the distinct ones).

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

The square root of 78642332 is about 8868.0511951612. The cubic root of 78642332 is about 428.4355117995.

The spelling of 78642332 in words is "seventy-eight million, six hundred forty-two thousand, three hundred thirty-two".