78703440 has 80 divisors (see below), whose sum is σ = 250603008. Its totient is φ = 20418048.

The previous prime is 78703399. The next prime is 78703487. The reversal of 78703440 is 4430787.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4449 + ... + 13311.

Almost surely, 2^78703440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78703440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125301504).

78703440 is an abundant number, since it is smaller than the sum of its proper divisors (171899568).

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

78703440 is a wasteful number, since it uses less digits than its factorization.

78703440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8916 (or 8910 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 33.

The square root of 78703440 is about 8871.4959279707. The cubic root of 78703440 is about 428.5464531477.

The spelling of 78703440 in words is "seventy-eight million, seven hundred three thousand, four hundred forty".