78654532 has 12 divisors (see below), whose sum is σ = 150158736. Its totient is φ = 35752040.

The previous prime is 78654517. The next prime is 78654539. The reversal of 78654532 is 23545687.

It is not an unprimeable number, because it can be changed into a prime (78654539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 893758 + ... + 893845.

It is an arithmetic number, because the mean of its divisors is an integer number (12513228).

Almost surely, 2^78654532 is an apocalyptic number.

It is an amenable number.

78654532 is a deficient number, since it is larger than the sum of its proper divisors (71504204).

78654532 is a wasteful number, since it uses less digits than its factorization.

78654532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1787618 (or 1787616 counting only the distinct ones).

The product of its digits is 201600, while the sum is 40.

The square root of 78654532 is about 8868.7390310010. The cubic root of 78654532 is about 428.4576654448.

The spelling of 78654532 in words is "seventy-eight million, six hundred fifty-four thousand, five hundred thirty-two".