865722140 has 48 divisors (see below), whose sum is σ = 1891838592. Its totient is φ = 332507136.

The previous prime is 865722133. The next prime is 865722149. The reversal of 865722140 is 41227568.

It is a self number, because there is not a number n which added to its sum of digits gives 865722140.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865722149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41132 + ... + 58508.

It is an arithmetic number, because the mean of its divisors is an integer number (39413304).

Almost surely, 2^865722140 is an apocalyptic number.

It is an amenable number.

865722140 is an abundant number, since it is smaller than the sum of its proper divisors (1026116452).

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

865722140 is a wasteful number, since it uses less digits than its factorization.

865722140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17486 (or 17484 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 865722140 is about 29423.1565267903. The cubic root of 865722140 is about 953.0730183458.

The spelling of 865722140 in words is "eight hundred sixty-five million, seven hundred twenty-two thousand, one hundred forty".