78057844 has 6 divisors (see below), whose sum is σ = 136601234. Its totient is φ = 39028920.

The previous prime is 78057841. The next prime is 78057851. The reversal of 78057844 is 44875087.

It can be written as a sum of positive squares in only one way, i.e., 75030244 + 3027600 = 8662^2 + 1740^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 78057844.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78057841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9757227 + ... + 9757234.

Almost surely, 2^78057844 is an apocalyptic number.

It is an amenable number.

78057844 is a deficient number, since it is larger than the sum of its proper divisors (58543390).

78057844 is a wasteful number, since it uses less digits than its factorization.

78057844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19514465 (or 19514463 counting only the distinct ones).

The product of its (nonzero) digits is 250880, while the sum is 43.

The square root of 78057844 is about 8835.0350310568. The cubic root of 78057844 is about 427.3714607338.

The spelling of 78057844 in words is "seventy-eight million, fifty-seven thousand, eight hundred forty-four".