78632477 has 16 divisors (see below), whose sum is σ = 99648384. Its totient is φ = 60264000.

The previous prime is 78632471. The next prime is 78632483. The reversal of 78632477 is 77423687.

It is an interprime number because it is at equal distance from previous prime (78632471) and next prime (78632483).

It is a cyclic number.

It is not a de Polignac number, because 78632477 - 2⁸ = 78632221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78632471) 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, 3674 + ... + 13067.

It is an arithmetic number, because the mean of its divisors is an integer number (6228024).

Almost surely, 2^78632477 is an apocalyptic number.

78632477 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

It is an amenable number.

78632477 is a deficient number, since it is larger than the sum of its proper divisors (21015907).

78632477 is a wasteful number, since it uses less digits than its factorization.

78632477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16820.

The product of its digits is 395136, while the sum is 44.

The square root of 78632477 is about 8867.4955314339. The cubic root of 78632477 is about 428.4176147024.

The spelling of 78632477 in words is "seventy-eight million, six hundred thirty-two thousand, four hundred seventy-seven".