78038712 has 24 divisors (see below), whose sum is σ = 211355040. Its totient is φ = 26012880.

The previous prime is 78038711. The next prime is 78038717. The reversal of 78038712 is 21783087.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78038711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 541864 + ... + 542007.

It is an arithmetic number, because the mean of its divisors is an integer number (8806460).

Almost surely, 2^78038712 is an apocalyptic number.

78038712 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

78038712 is an abundant number, since it is smaller than the sum of its proper divisors (133316328).

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

78038712 is a wasteful number, since it uses less digits than its factorization.

78038712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1083883 (or 1083876 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The square root of 78038712 is about 8833.9522298912. The cubic root of 78038712 is about 427.3365415915.

The spelling of 78038712 in words is "seventy-eight million, thirty-eight thousand, seven hundred twelve".