78743478 has 32 divisors (see below), whose sum is σ = 175053312. Its totient is φ = 23410400.

The previous prime is 78743459. The next prime is 78743479. The reversal of 78743478 is 87434787.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78743479) 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, 7758 + ... + 14753.

It is an arithmetic number, because the mean of its divisors is an integer number (5470416).

Almost surely, 2^78743478 is an apocalyptic number.

78743478 is an abundant number, since it is smaller than the sum of its proper divisors (96309834).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78743478 is a wasteful number, since it uses less digits than its factorization.

78743478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22580.

The product of its digits is 1053696, while the sum is 48.

The square root of 78743478 is about 8873.7521939707. The cubic root of 78743478 is about 428.6191108535.

The spelling of 78743478 in words is "seventy-eight million, seven hundred forty-three thousand, four hundred seventy-eight".