78742853 has 16 divisors (see below), whose sum is σ = 92428800. Its totient is φ = 67053168.

The previous prime is 78742849. The next prime is 78742877. The reversal of 78742853 is 35824787.

It is a happy number.

It is not a de Polignac number, because 78742853 - 2² = 78742849 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78742553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58676 + ... + 60002.

It is an arithmetic number, because the mean of its divisors is an integer number (5776800).

Almost surely, 2^78742853 is an apocalyptic number.

It is an amenable number.

78742853 is a deficient number, since it is larger than the sum of its proper divisors (13685947).

78742853 is a wasteful number, since it uses less digits than its factorization.

78742853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1521 (or 1507 counting only the distinct ones).

The product of its digits is 376320, while the sum is 44.

The square root of 78742853 is about 8873.7169776819. The cubic root of 78742853 is about 428.6179768436.

The spelling of 78742853 in words is "seventy-eight million, seven hundred forty-two thousand, eight hundred fifty-three".