28379157878 has 8 divisors (see below), whose sum is σ = 42617058120. Its totient is φ = 14173471840.

The previous prime is 28379157871. The next prime is 28379157881. The reversal of 28379157878 is 87875197382.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28379157871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8051348 + ... + 8054871.

It is an arithmetic number, because the mean of its divisors is an integer number (5327132265).

Almost surely, 2^28379157878 is an apocalyptic number.

28379157878 is a deficient number, since it is larger than the sum of its proper divisors (14237900242).

28379157878 is a wasteful number, since it uses less digits than its factorization.

28379157878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16107102.

The product of its digits is 47416320, while the sum is 65.

The spelling of 28379157878 in words is "twenty-eight billion, three hundred seventy-nine million, one hundred fifty-seven thousand, eight hundred seventy-eight".