132728278 has 4 divisors (see below), whose sum is σ = 199092420. Its totient is φ = 66364138.

The previous prime is 132728251. The next prime is 132728279. The reversal of 132728278 is 872827231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 872827231 = 14543 ⋅60017.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 132728278.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (132728279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33182068 + ... + 33182071.

It is an arithmetic number, because the mean of its divisors is an integer number (49773105).

Almost surely, 2^132728278 is an apocalyptic number.

132728278 is a deficient number, since it is larger than the sum of its proper divisors (66364142).

132728278 is an equidigital number, since it uses as much as digits as its factorization.

132728278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66364141.

The product of its digits is 75264, while the sum is 40.

The square root of 132728278 is about 11520.7759287298. The cubic root of 132728278 is about 510.0990170426.

The spelling of 132728278 in words is "one hundred thirty-two million, seven hundred twenty-eight thousand, two hundred seventy-eight".