78089740 has 12 divisors (see below), whose sum is σ = 163988496. Its totient is φ = 31235888.

The previous prime is 78089689. The next prime is 78089747. The reversal of 78089740 is 4798087.

It is not an unprimeable number, because it can be changed into a prime (78089747) 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, 1952224 + ... + 1952263.

It is an arithmetic number, because the mean of its divisors is an integer number (13665708).

Almost surely, 2^78089740 is an apocalyptic number.

It is an amenable number.

78089740 is an abundant number, since it is smaller than the sum of its proper divisors (85898756).

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

78089740 is a wasteful number, since it uses less digits than its factorization.

78089740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3904496 (or 3904494 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 43.

The square root of 78089740 is about 8836.8399329172. The cubic root of 78089740 is about 427.4296636559.

The spelling of 78089740 in words is "seventy-eight million, eighty-nine thousand, seven hundred forty".