78893748 has 18 divisors (see below), whose sum is σ = 199425954. Its totient is φ = 26297904.

The previous prime is 78893747. The next prime is 78893761. The reversal of 78893748 is 84739887.

It can be written as a sum of positive squares in only one way, i.e., 76422564 + 2471184 = 8742^2 + 1572^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 78893694 and 78893703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78893743) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1095711 + ... + 1095782.

Almost surely, 2^78893748 is an apocalyptic number.

It is an amenable number.

78893748 is an abundant number, since it is smaller than the sum of its proper divisors (120532206).

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

78893748 is a wasteful number, since it uses less digits than its factorization.

78893748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2191503 (or 2191498 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 54.

The square root of 78893748 is about 8882.2152642232. The cubic root of 78893748 is about 428.8915891482.

The spelling of 78893748 in words is "seventy-eight million, eight hundred ninety-three thousand, seven hundred forty-eight".