78349452 has 12 divisors (see below), whose sum is σ = 182815416. Its totient is φ = 26116480.

The previous prime is 78349441. The next prime is 78349471. The reversal of 78349452 is 25494387.

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

It is a super-2 number, since 2×78349452² = 12277273257400608, which contains 22 as substring.

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3264549 + ... + 3264572.

It is an arithmetic number, because the mean of its divisors is an integer number (15234618).

Almost surely, 2^78349452 is an apocalyptic number.

It is an amenable number.

78349452 is an abundant number, since it is smaller than the sum of its proper divisors (104465964).

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

78349452 is a wasteful number, since it uses less digits than its factorization.

78349452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6529128 (or 6529126 counting only the distinct ones).

The product of its digits is 241920, while the sum is 42.

The square root of 78349452 is about 8851.5225808897. The cubic root of 78349452 is about 427.9029899213.

The spelling of 78349452 in words is "seventy-eight million, three hundred forty-nine thousand, four hundred fifty-two".