78774132 has 12 divisors (see below), whose sum is σ = 183806336. Its totient is φ = 26258040.

The previous prime is 78774109. The next prime is 78774169. The reversal of 78774132 is 23147787.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3282244 + ... + 3282267.

Almost surely, 2^78774132 is an apocalyptic number.

It is an amenable number.

78774132 is an abundant number, since it is smaller than the sum of its proper divisors (105032204).

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

78774132 is a wasteful number, since it uses less digits than its factorization.

78774132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6564518 (or 6564516 counting only the distinct ones).

The product of its digits is 65856, while the sum is 39.

The square root of 78774132 is about 8875.4792546656. The cubic root of 78774132 is about 428.6747225942.

The spelling of 78774132 in words is "seventy-eight million, seven hundred seventy-four thousand, one hundred thirty-two".