78240043 has 16 divisors (see below), whose sum is σ = 98219520. Its totient is φ = 60768576.

The previous prime is 78240017. The next prime is 78240047. The reversal of 78240043 is 34004287.

It is not a de Polignac number, because 78240043 - 2⁵ = 78240011 is a prime.

It is a super-2 number, since 2×78240043² = 12243008657283698, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78239993 and 78240020.

It is not an unprimeable number, because it can be changed into a prime (78240047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9730 + ... + 15847.

It is an arithmetic number, because the mean of its divisors is an integer number (6138720).

Almost surely, 2^78240043 is an apocalyptic number.

78240043 is a deficient number, since it is larger than the sum of its proper divisors (19979477).

78240043 is a wasteful number, since it uses less digits than its factorization.

78240043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25626.

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 78240043 is about 8845.3401856571. The cubic root of 78240043 is about 427.7037192359.

The spelling of 78240043 in words is "seventy-eight million, two hundred forty thousand, forty-three".