78488744 has 16 divisors (see below), whose sum is σ = 148821300. Its totient is φ = 38803072.

The previous prime is 78488741. The next prime is 78488747. The reversal of 78488744 is 44788487.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (78488741) and next prime (78488747).

It can be written as a sum of positive squares in 2 ways, for example, as 76772644 + 1716100 = 8762^2 + 1310^2 .

It is a junction number, because it is equal to n+sod(n) for n = 78488692 and 78488701.

It is not an unprimeable number, because it can be changed into a prime (78488741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54407 + ... + 55830.

Almost surely, 2^78488744 is an apocalyptic number.

It is an amenable number.

78488744 is a deficient number, since it is larger than the sum of its proper divisors (70332556).

78488744 is a wasteful number, since it uses less digits than its factorization.

78488744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110332 (or 110328 counting only the distinct ones).

The product of its digits is 1605632, while the sum is 50.

The square root of 78488744 is about 8859.3873377339. The cubic root of 78488744 is about 428.1564193753.

The spelling of 78488744 in words is "seventy-eight million, four hundred eighty-eight thousand, seven hundred forty-four".