2860509981 has 32 divisors (see below), whose sum is σ = 4661031168. Its totient is φ = 1523174400.

The previous prime is 2860509961. The next prime is 2860510019. The reversal of 2860509981 is 1899050682.

It is a happy number.

It is not a de Polignac number, because 2860509981 - 2¹⁷ = 2860378909 is a prime.

It is a super-2 number, since 2×2860509981² = 16365034702801240722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2860509981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2860509961) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3610 + ... + 75723.

It is an arithmetic number, because the mean of its divisors is an integer number (145657224).

Almost surely, 2^2860509981 is an apocalyptic number.

2860509981 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2860509981 is a deficient number, since it is larger than the sum of its proper divisors (1800521187).

2860509981 is a wasteful number, since it uses less digits than its factorization.

2860509981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79461.

The product of its (nonzero) digits is 311040, while the sum is 48.

The square root of 2860509981 is about 53483.7356679580. The cubic root of 2860509981 is about 1419.5406139796.

The spelling of 2860509981 in words is "two billion, eight hundred sixty million, five hundred nine thousand, nine hundred eighty-one".