2861397538 has 16 divisors (see below), whose sum is σ = 4357152000. Its totient is φ = 1409103072.

The previous prime is 2861397533. The next prime is 2861397559. The reversal of 2861397538 is 8357931682.

It is a super-2 number, since 2×2861397538² = 16375191740944922888, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2861397533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42483 + ... + 86761.

It is an arithmetic number, because the mean of its divisors is an integer number (272322000).

Almost surely, 2^2861397538 is an apocalyptic number.

2861397538 is a deficient number, since it is larger than the sum of its proper divisors (1495754462).

2861397538 is a wasteful number, since it uses less digits than its factorization.

2861397538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44769.

The product of its digits is 2177280, while the sum is 52.

The square root of 2861397538 is about 53492.0324721355. The cubic root of 2861397538 is about 1419.6874168144.

The spelling of 2861397538 in words is "two billion, eight hundred sixty-one million, three hundred ninety-seven thousand, five hundred thirty-eight".