78041872 has 10 divisors (see below), whose sum is σ = 151206158. Its totient is φ = 39020928.

The previous prime is 78041867. The next prime is 78041903. The reversal of 78041872 is 27814087.

It can be written as a sum of positive squares in only one way, i.e., 75272976 + 2768896 = 8676^2 + 1664^2 .

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 as a sum of consecutive naturals, namely, 2438793 + ... + 2438824.

Almost surely, 2^78041872 is an apocalyptic number.

It is an amenable number.

78041872 is a deficient number, since it is larger than the sum of its proper divisors (73164286).

78041872 is a wasteful number, since it uses less digits than its factorization.

78041872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4877625 (or 4877619 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 37.

The square root of 78041872 is about 8834.1310834739. The cubic root of 78041872 is about 427.3423095205.

The spelling of 78041872 in words is "seventy-eight million, forty-one thousand, eight hundred seventy-two".