146019978 has 48 divisors (see below), whose sum is σ = 358656480. Its totient is φ = 42563232.

The previous prime is 146019977. The next prime is 146020033. The reversal of 146019978 is 879910641.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (146019977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11976 + ... + 20867.

It is an arithmetic number, because the mean of its divisors is an integer number (7472010).

Almost surely, 2^146019978 is an apocalyptic number.

146019978 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

146019978 is an abundant number, since it is smaller than the sum of its proper divisors (212636502).

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

146019978 is a wasteful number, since it uses less digits than its factorization.

146019978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32883 (or 32880 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 146019978 is about 12083.8726408383. The cubic root of 146019978 is about 526.5877592799.

The spelling of 146019978 in words is "one hundred forty-six million, nineteen thousand, nine hundred seventy-eight".