78742352 has 20 divisors (see below), whose sum is σ = 164299380. Its totient is φ = 36342528.

The previous prime is 78742333. The next prime is 78742361. The reversal of 78742352 is 25324787.

It can be written as a sum of positive squares in 2 ways, for example, as 40500496 + 38241856 = 6364^2 + 6184^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 189077 + ... + 189492.

It is an arithmetic number, because the mean of its divisors is an integer number (8214969).

Almost surely, 2^78742352 is an apocalyptic number.

It is an amenable number.

78742352 is an abundant number, since it is smaller than the sum of its proper divisors (85557028).

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

78742352 is a wasteful number, since it uses less digits than its factorization.

78742352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378590 (or 378584 counting only the distinct ones).

The product of its digits is 94080, while the sum is 38.

The square root of 78742352 is about 8873.6887482039. The cubic root of 78742352 is about 428.6170678169.

The spelling of 78742352 in words is "seventy-eight million, seven hundred forty-two thousand, three hundred fifty-two".