78057748 has 6 divisors (see below), whose sum is σ = 136601066. Its totient is φ = 39028872.

The previous prime is 78057739. The next prime is 78057751. The reversal of 78057748 is 84775087.

It can be written as a sum of positive squares in only one way, i.e., 66781584 + 11276164 = 8172^2 + 3358^2 .

It is a junction number, because it is equal to n+sod(n) for n = 78057698 and 78057707.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9757215 + ... + 9757222.

Almost surely, 2^78057748 is an apocalyptic number.

It is an amenable number.

78057748 is a deficient number, since it is larger than the sum of its proper divisors (58543318).

78057748 is a wasteful number, since it uses less digits than its factorization.

78057748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19514441 (or 19514439 counting only the distinct ones).

The product of its (nonzero) digits is 439040, while the sum is 46.

The square root of 78057748 is about 8835.0295981394. The cubic root of 78057748 is about 427.3712855318.

It can be divided in two parts, 780577 and 48, that added together give a triangular number (780625 = T₁₂₄₉).

The spelling of 78057748 in words is "seventy-eight million, fifty-seven thousand, seven hundred forty-eight".