1979157204 has 36 divisors (see below), whose sum is σ = 5297157684. Its totient is φ = 620911872.

The previous prime is 1979157197. The next prime is 1979157223. The reversal of 1979157204 is 4027519791.

1979157204 is a `hidden beast` number, since 1 + 9 + 79 + 1 + 572 + 0 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1271065104 + 708092100 = 35652^2 + 26610^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1979157204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1616347 + ... + 1617570.

It is an arithmetic number, because the mean of its divisors is an integer number (147143269).

Almost surely, 2^1979157204 is an apocalyptic number.

It is an amenable number.

1979157204 is an abundant number, since it is smaller than the sum of its proper divisors (3318000480).

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

1979157204 is a wasteful number, since it uses less digits than its factorization.

1979157204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3233944 (or 3233939 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 45.

The square root of 1979157204 is about 44487.7196988113. The cubic root of 1979157204 is about 1255.5290445280.

The spelling of 1979157204 in words is "one billion, nine hundred seventy-nine million, one hundred fifty-seven thousand, two hundred four".