1974809858 has 30 divisors (see below), whose sum is σ = 3498051411. Its totient is φ = 833715036.

The previous prime is 1974809849. The next prime is 1974809911. The reversal of 1974809858 is 8589084791.

It can be written as a sum of positive squares in only one way, i.e., 987404929 + 987404929 = 31423^2 + 31423^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=31423.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1974809797 and 1974809806.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 29474741 + ... + 29474807.

Almost surely, 2^1974809858 is an apocalyptic number.

1974809858 is a deficient number, since it is larger than the sum of its proper divisors (1523241553).

1974809858 is an frugal number, since it uses more digits than its factorization.

1974809858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284 (or 76 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 59.

The square root of 1974809858 is about 44438.8327704498. The cubic root of 1974809858 is about 1254.6090872038.

The spelling of 1974809858 in words is "one billion, nine hundred seventy-four million, eight hundred nine thousand, eight hundred fifty-eight".