78960440 has 32 divisors (see below), whose sum is σ = 191328480. Its totient is φ = 29154432.

The previous prime is 78960397. The next prime is 78960451. The reversal of 78960440 is 4406987.

It is a happy number.

It is a super-4 number, since 4×78960440⁴ (a number of 33 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78960394 and 78960403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75404 + ... + 76443.

It is an arithmetic number, because the mean of its divisors is an integer number (5979015).

Almost surely, 2^78960440 is an apocalyptic number.

It is an amenable number.

78960440 is an abundant number, since it is smaller than the sum of its proper divisors (112368040).

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

78960440 is a wasteful number, since it uses less digits than its factorization.

78960440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151871 (or 151867 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 78960440 is about 8885.9687147772. The cubic root of 78960440 is about 429.0124081081.

The spelling of 78960440 in words is "seventy-eight million, nine hundred sixty thousand, four hundred forty".