862740891 has 12 divisors (see below), whose sum is σ = 1255148440. Its totient is φ = 571021920.

The previous prime is 862740869. The next prime is 862740911. The reversal of 862740891 is 198047268.

It is not a de Polignac number, because 862740891 - 2⁹ = 862740379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (862740841) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 343570 + ... + 346071.

Almost surely, 2^862740891 is an apocalyptic number.

862740891 is a deficient number, since it is larger than the sum of its proper divisors (392407549).

862740891 is a wasteful number, since it uses less digits than its factorization.

862740891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689786 (or 689783 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 862740891 is about 29372.4512255957. The cubic root of 862740891 is about 951.9777416794.

The spelling of 862740891 in words is "eight hundred sixty-two million, seven hundred forty thousand, eight hundred ninety-one".