2861407642 has 16 divisors (see below), whose sum is σ = 4386609864. Its totient is φ = 1399464000.

The previous prime is 2861407639. The next prime is 2861407673. The reversal of 2861407642 is 2467041682.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 73462041 + 2787945601 = 8571^2 + 52801^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2861407595 and 2861407604.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 42709 + ... + 86872.

Almost surely, 2^2861407642 is an apocalyptic number.

2861407642 is a deficient number, since it is larger than the sum of its proper divisors (1525202222).

2861407642 is a wasteful number, since it uses less digits than its factorization.

2861407642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129825.

The product of its (nonzero) digits is 129024, while the sum is 40.

The square root of 2861407642 is about 53492.1269160238. The cubic root of 2861407642 is about 1419.6890878515.

The spelling of 2861407642 in words is "two billion, eight hundred sixty-one million, four hundred seven thousand, six hundred forty-two".