78532279 has 8 divisors (see below), whose sum is σ = 90217760. Its totient is φ = 66963456.

The previous prime is 78532249. The next prime is 78532291. The reversal of 78532279 is 97223587.

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

It is not a de Polignac number, because 78532279 - 2¹³ = 78524087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78532219) 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, 27714 + ... + 30415.

It is an arithmetic number, because the mean of its divisors is an integer number (11277220).

Almost surely, 2^78532279 is an apocalyptic number.

78532279 is a deficient number, since it is larger than the sum of its proper divisors (11685481).

78532279 is a wasteful number, since it uses less digits than its factorization.

78532279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58329.

The product of its digits is 211680, while the sum is 43.

The square root of 78532279 is about 8861.8439954673. The cubic root of 78532279 is about 428.2355659448.

The spelling of 78532279 in words is "seventy-eight million, five hundred thirty-two thousand, two hundred seventy-nine".