2864153978 has 48 divisors (see below), whose sum is σ = 5113987560. Its totient is φ = 1199245824.

The previous prime is 2864153977. The next prime is 2864154043. The reversal of 2864153978 is 8793514682.

It can be written as a sum of positive squares in 4 ways, for example, as 2153238409 + 710915569 = 46403^2 + 26663^2 .

It is not an unprimeable number, because it can be changed into a prime (2864153977) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 777950 + ... + 781622.

Almost surely, 2^2864153978 is an apocalyptic number.

2864153978 is a deficient number, since it is larger than the sum of its proper divisors (2249833582).

2864153978 is a wasteful number, since it uses less digits than its factorization.

2864153978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3871 (or 3864 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 53.

The square root of 2864153978 is about 53517.7912287120. The cubic root of 2864153978 is about 1420.1431413595.

The spelling of 2864153978 in words is "two billion, eight hundred sixty-four million, one hundred fifty-three thousand, nine hundred seventy-eight".