78349474 has 16 divisors (see below), whose sum is σ = 138945600. Its totient is φ = 32420304.

The previous prime is 78349471. The next prime is 78349501. The reversal of 78349474 is 47494387.

It is a super-2 number, since 2×78349474² = 12277280152153352, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (78349471) 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 7 ways as a sum of consecutive naturals, for example, 96084 + ... + 96895.

It is an arithmetic number, because the mean of its divisors is an integer number (8684100).

Almost surely, 2^78349474 is an apocalyptic number.

78349474 is a deficient number, since it is larger than the sum of its proper divisors (60596126).

78349474 is a wasteful number, since it uses less digits than its factorization.

78349474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193017.

The product of its digits is 677376, while the sum is 46.

The square root of 78349474 is about 8851.5238236136. The cubic root of 78349474 is about 427.9030299721.

The spelling of 78349474 in words is "seventy-eight million, three hundred forty-nine thousand, four hundred seventy-four".