1978084146 has 32 divisors (see below), whose sum is σ = 4098636288. Its totient is φ = 635771520.

The previous prime is 1978084133. The next prime is 1978084153. The reversal of 1978084146 is 6414808791.

It is a junction number, because it is equal to n+sod(n) for n = 1978084095 and 1978084104.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32326 + ... + 70718.

It is an arithmetic number, because the mean of its divisors is an integer number (128082384).

Almost surely, 2^1978084146 is an apocalyptic number.

1978084146 is an abundant number, since it is smaller than the sum of its proper divisors (2120552142).

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

1978084146 is a wasteful number, since it uses less digits than its factorization.

1978084146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38706.

The product of its (nonzero) digits is 387072, while the sum is 48.

The square root of 1978084146 is about 44475.6579040715. The cubic root of 1978084146 is about 1255.3020962356.

The spelling of 1978084146 in words is "one billion, nine hundred seventy-eight million, eighty-four thousand, one hundred forty-six".