78464477 has 16 divisors (see below), whose sum is σ = 100773120. Its totient is φ = 59380992.

The previous prime is 78464467. The next prime is 78464489. The reversal of 78464477 is 77446487.

It is a cyclic number.

It is not a de Polignac number, because 78464477 - 2¹² = 78460381 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78464467) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16652 + ... + 20837.

It is an arithmetic number, because the mean of its divisors is an integer number (6298320).

Almost surely, 2^78464477 is an apocalyptic number.

It is an amenable number.

78464477 is a deficient number, since it is larger than the sum of its proper divisors (22308643).

78464477 is a wasteful number, since it uses less digits than its factorization.

78464477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37532.

The product of its digits is 1053696, while the sum is 47.

The square root of 78464477 is about 8858.0176676274. The cubic root of 78464477 is about 428.1122892989.

The spelling of 78464477 in words is "seventy-eight million, four hundred sixty-four thousand, four hundred seventy-seven".