147944778 has 16 divisors (see below), whose sum is σ = 313295040. Its totient is φ = 46414016.

The previous prime is 147944749. The next prime is 147944791. The reversal of 147944778 is 877449741.

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 147944778.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 725118 + ... + 725321.

It is an arithmetic number, because the mean of its divisors is an integer number (19580940).

Almost surely, 2^147944778 is an apocalyptic number.

147944778 is an abundant number, since it is smaller than the sum of its proper divisors (165350262).

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

147944778 is a wasteful number, since it uses less digits than its factorization.

147944778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1450461.

The product of its digits is 1580544, while the sum is 51.

The square root of 147944778 is about 12163.2552386275. The cubic root of 147944778 is about 528.8914506234.

The spelling of 147944778 in words is "one hundred forty-seven million, nine hundred forty-four thousand, seven hundred seventy-eight".