78071340 has 48 divisors (see below), whose sum is σ = 219179520. Its totient is φ = 20763840.

The previous prime is 78071333. The next prime is 78071351. The reversal of 78071340 is 4317087.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 78071298 and 78071307.

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, 24351 + ... + 27369.

It is an arithmetic number, because the mean of its divisors is an integer number (4566240).

Almost surely, 2^78071340 is an apocalyptic number.

It is an amenable number.

78071340 is an abundant number, since it is smaller than the sum of its proper divisors (141108180).

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

78071340 is a wasteful number, since it uses less digits than its factorization.

78071340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3462 (or 3460 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 78071340 is about 8835.7987754362. The cubic root of 78071340 is about 427.3960897891.

The spelling of 78071340 in words is "seventy-eight million, seventy-one thousand, three hundred forty".