147978 has 12 divisors (see below), whose sum is σ = 320658. Its totient is φ = 49320.

The previous prime is 147977. The next prime is 147997. The reversal of 147978 is 879741.

It can be written as a sum of positive squares in only one way, i.e., 91809 + 56169 = 303^2 + 237^2 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 147978.

It is not an unprimeable number, because it can be changed into a prime (147977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4093 + ... + 4128.

2¹⁴⁷⁹⁷⁸ is an apocalyptic number.

147978 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

147978 is an abundant number, since it is smaller than the sum of its proper divisors (172680).

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

147978 is a wasteful number, since it uses less digits than its factorization.

147978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8229 (or 8226 counting only the distinct ones).

The product of its digits is 14112, while the sum is 36.

The square root of 147978 is about 384.6790870323. The cubic root of 147978 is about 52.8931036377.

The spelling of 147978 in words is "one hundred forty-seven thousand, nine hundred seventy-eight".