42728472078 has 32 divisors (see below), whose sum is σ = 90514622880. Its totient is φ = 13400448000.

The previous prime is 42728472067. The next prime is 42728472089. The reversal of 42728472078 is 87027482724.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (42728472067) and next prime (42728472089).

It is a super-2 number, since 2×42728472078² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a self number, because there is not a number n which added to its sum of digits gives 42728472078.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 236308 + ... + 375896.

It is an arithmetic number, because the mean of its divisors is an integer number (2828581965).

Almost surely, 2^42728472078 is an apocalyptic number.

42728472078 is an abundant number, since it is smaller than the sum of its proper divisors (47786150802).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42728472078 is a wasteful number, since it uses less digits than its factorization.

42728472078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142612.

The product of its (nonzero) digits is 2809856, while the sum is 51.

The spelling of 42728472078 in words is "forty-two billion, seven hundred twenty-eight million, four hundred seventy-two thousand, seventy-eight".