78633401 has 16 divisors (see below), whose sum is σ = 98700288. Its totient is φ = 60858000.

The previous prime is 78633377. The next prime is 78633407. The reversal of 78633401 is 10433687.

It is not a de Polignac number, because 78633401 - 2¹⁴ = 78617017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (78633407) 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 in 15 ways as a sum of consecutive naturals, for example, 8246 + ... + 15008.

It is an arithmetic number, because the mean of its divisors is an integer number (6168768).

Almost surely, 2^78633401 is an apocalyptic number.

It is an amenable number.

78633401 is a deficient number, since it is larger than the sum of its proper divisors (20066887).

78633401 is a wasteful number, since it uses less digits than its factorization.

78633401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6932.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 78633401 is about 8867.5476316736. The cubic root of 78633401 is about 428.4192927891.

The spelling of 78633401 in words is "seventy-eight million, six hundred thirty-three thousand, four hundred one".