78240748 has 12 divisors (see below), whose sum is σ = 138133800. Its totient is φ = 38773952.

The previous prime is 78240739. The next prime is 78240769. The reversal of 78240748 is 84704287.

It is a happy number.

It is a super-2 number, since 2×78240748² = 12243229295199008, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78240748.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86098 + ... + 87001.

It is an arithmetic number, because the mean of its divisors is an integer number (11511150).

Almost surely, 2^78240748 is an apocalyptic number.

It is an amenable number.

78240748 is a deficient number, since it is larger than the sum of its proper divisors (59893052).

78240748 is a wasteful number, since it uses less digits than its factorization.

78240748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173216 (or 173214 counting only the distinct ones).

The product of its (nonzero) digits is 100352, while the sum is 40.

The square root of 78240748 is about 8845.3800370589. The cubic root of 78240748 is about 427.7050038732.

The spelling of 78240748 in words is "seventy-eight million, two hundred forty thousand, seven hundred forty-eight".