78071530 has 32 divisors (see below), whose sum is σ = 142819200. Its totient is φ = 30724800.

The previous prime is 78071527. The next prime is 78071537. The reversal of 78071530 is 3517087.

It is a junction number, because it is equal to n+sod(n) for n = 78071492 and 78071501.

It is not an unprimeable number, because it can be changed into a prime (78071537) 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, 224817 + ... + 225163.

It is an arithmetic number, because the mean of its divisors is an integer number (4463100).

Almost surely, 2^78071530 is an apocalyptic number.

78071530 is a deficient number, since it is larger than the sum of its proper divisors (64747670).

78071530 is a wasteful number, since it uses less digits than its factorization.

78071530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654.

The product of its (nonzero) digits is 5880, while the sum is 31.

The square root of 78071530 is about 8835.8095271458. The cubic root of 78071530 is about 427.3964365027.

The spelling of 78071530 in words is "seventy-eight million, seventy-one thousand, five hundred thirty".