2858149978 has 4 divisors (see below), whose sum is σ = 4287224970. Its totient is φ = 1429074988.

The previous prime is 2858149967. The next prime is 2858149979. The reversal of 2858149978 is 8799418582.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2342269609 + 515880369 = 48397^2 + 22713^2 .

It is not an unprimeable number, because it can be changed into a prime (2858149979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 714537493 + ... + 714537496.

Almost surely, 2^2858149978 is an apocalyptic number.

2858149978 is a deficient number, since it is larger than the sum of its proper divisors (1429074992).

2858149978 is a wasteful number, since it uses less digits than its factorization.

2858149978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1429074991.

The product of its digits is 11612160, while the sum is 61.

The square root of 2858149978 is about 53461.6683054317. The cubic root of 2858149978 is about 1419.1501192931.

The spelling of 2858149978 in words is "two billion, eight hundred fifty-eight million, one hundred forty-nine thousand, nine hundred seventy-eight".