2861397540 has 36 divisors (see below), whose sum is σ = 8679573084. Its totient is φ = 763039296.

The previous prime is 2861397533. The next prime is 2861397559. The reversal of 2861397540 is 457931682.

2861397540 is a `hidden beast` number, since 2 + 8 + 6 + 13 + 97 + 540 = 666.

2861397540 is digitally balanced in base 10, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2276434944 + 584962596 = 47712^2 + 24186^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (45).

2861397540 is strictly pandigital in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7948147 + ... + 7948506.

It is a 1-persistent number, because it is pandigital, but 2⋅2861397540 = 5722795080 is not.

Almost surely, 2^2861397540 is an apocalyptic number.

2861397540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2861397540 is an abundant number, since it is smaller than the sum of its proper divisors (5818175544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2861397540 is a wasteful number, since it uses less digits than its factorization.

2861397540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15896668 (or 15896663 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 2861397540 is about 53492.0324908299. The cubic root of 2861397540 is about 1419.6874171451.

The spelling of 2861397540 in words is "two billion, eight hundred sixty-one million, three hundred ninety-seven thousand, five hundred forty".