78148427 has 16 divisors (see below), whose sum is σ = 93038592. Its totient is φ = 64229760.

The previous prime is 78148393. The next prime is 78148453. The reversal of 78148427 is 72484187.

It is a happy number.

It is not a de Polignac number, because 78148427 - 2⁸ = 78148171 is a prime.

It is a super-2 number, since 2×78148427² = 12214353285148658, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78148487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22928 + ... + 26114.

It is an arithmetic number, because the mean of its divisors is an integer number (5814912).

Almost surely, 2^78148427 is an apocalyptic number.

78148427 is a deficient number, since it is larger than the sum of its proper divisors (14890165).

78148427 is a wasteful number, since it uses less digits than its factorization.

78148427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3338.

The product of its digits is 100352, while the sum is 41.

The square root of 78148427 is about 8840.1598967439. The cubic root of 78148427 is about 427.5367126457.

The spelling of 78148427 in words is "seventy-eight million, one hundred forty-eight thousand, four hundred twenty-seven".