78073741 has 8 divisors (see below), whose sum is σ = 82755000. Its totient is φ = 73402368.

The previous prime is 78073739. The next prime is 78073747. The reversal of 78073741 is 14737087.

It can be written as a sum of positive squares in 4 ways, for example, as 28933641 + 49140100 = 5379^2 + 7010^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78073741 - 2¹ = 78073739 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78073741.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78073747) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19395 + ... + 23071.

It is an arithmetic number, because the mean of its divisors is an integer number (10344375).

Almost surely, 2^78073741 is an apocalyptic number.

It is an amenable number.

78073741 is a deficient number, since it is larger than the sum of its proper divisors (4681259).

78073741 is a wasteful number, since it uses less digits than its factorization.

78073741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4943.

The product of its (nonzero) digits is 32928, while the sum is 37.

The square root of 78073741 is about 8835.9346421304. The cubic root of 78073741 is about 427.4004711130.

The spelling of 78073741 in words is "seventy-eight million, seventy-three thousand, seven hundred forty-one".