78023340 has 72 divisors (see below), whose sum is σ = 244848240. Its totient is φ = 20087424.

The previous prime is 78023333. The next prime is 78023347. The reversal of 78023340 is 4332087.

It is an interprime number because it is at equal distance from previous prime (78023333) and next prime (78023347).

It is not an unprimeable number, because it can be changed into a prime (78023347) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2254 + ... + 12693.

It is an arithmetic number, because the mean of its divisors is an integer number (3400670).

Almost surely, 2^78023340 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 78023340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122424120).

78023340 is an abundant number, since it is smaller than the sum of its proper divisors (166824900).

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

78023340 is a wasteful number, since it uses less digits than its factorization.

78023340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14991 (or 14986 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 78023340 is about 8833.0821347930. The cubic root of 78023340 is about 427.3084809512.

The spelling of 78023340 in words is "seventy-eight million, twenty-three thousand, three hundred forty".