73128078 has 12 divisors (see below), whose sum is σ = 158444208. Its totient is φ = 24376020.

The previous prime is 73128073. The next prime is 73128089. The reversal of 73128078 is 87082137.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73128073) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2031318 + ... + 2031353.

It is an arithmetic number, because the mean of its divisors is an integer number (13203684).

Almost surely, 2^73128078 is an apocalyptic number.

73128078 is an abundant number, since it is smaller than the sum of its proper divisors (85316130).

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

73128078 is a wasteful number, since it uses less digits than its factorization.

73128078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4062679 (or 4062676 counting only the distinct ones).

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

The square root of 73128078 is about 8551.4956586553. The cubic root of 73128078 is about 418.1781975656.

The spelling of 73128078 in words is "seventy-three million, one hundred twenty-eight thousand, seventy-eight".