78057738 has 48 divisors (see below), whose sum is σ = 194220000. Its totient is φ = 22407840.

The previous prime is 78057713. The next prime is 78057739. The reversal of 78057738 is 83775087.

78057738 is a `hidden beast` number, since 78 + 0 + 577 + 3 + 8 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 78057693 and 78057702.

It is not an unprimeable number, because it can be changed into a prime (78057739) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6613 + ... + 14136.

It is an arithmetic number, because the mean of its divisors is an integer number (4046250).

Almost surely, 2^78057738 is an apocalyptic number.

78057738 is an abundant number, since it is smaller than the sum of its proper divisors (116162262).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78057738 is a wasteful number, since it uses less digits than its factorization.

78057738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20787 (or 20784 counting only the distinct ones).

The product of its (nonzero) digits is 329280, while the sum is 45.

The square root of 78057738 is about 8835.0290322104. The cubic root of 78057738 is about 427.3712672816.

The spelling of 78057738 in words is "seventy-eight million, fifty-seven thousand, seven hundred thirty-eight".