78530811 has 8 divisors (see below), whose sum is σ = 108318480. Its totient is φ = 50548512.

The previous prime is 78530807. The next prime is 78530813. The reversal of 78530811 is 11803587.

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

It is not a de Polignac number, because 78530811 - 2² = 78530807 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78530813) 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, 451240 + ... + 451413.

It is an arithmetic number, because the mean of its divisors is an integer number (13539810).

Almost surely, 2^78530811 is an apocalyptic number.

78530811 is a deficient number, since it is larger than the sum of its proper divisors (29787669).

78530811 is a wasteful number, since it uses less digits than its factorization.

78530811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 902685.

The product of its (nonzero) digits is 6720, while the sum is 33.

The square root of 78530811 is about 8861.7611680749. The cubic root of 78530811 is about 428.2328975994.

The spelling of 78530811 in words is "seventy-eight million, five hundred thirty thousand, eight hundred eleven".