55840867 has 4 divisors (see below), whose sum is σ = 58779880. Its totient is φ = 52901856.

The previous prime is 55840859. The next prime is 55840877. The reversal of 55840867 is 76804855.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76804855 = 5 ⋅15360971.

It is a cyclic number.

It is not a de Polignac number, because 55840867 - 2³ = 55840859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55840817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1469478 + ... + 1469515.

It is an arithmetic number, because the mean of its divisors is an integer number (14694970).

Almost surely, 2^55840867 is an apocalyptic number.

55840867 is a deficient number, since it is larger than the sum of its proper divisors (2939013).

55840867 is a wasteful number, since it uses less digits than its factorization.

55840867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2939012.

The product of its (nonzero) digits is 268800, while the sum is 43.

The square root of 55840867 is about 7472.6746884901. The cubic root of 55840867 is about 382.2234993191.

The spelling of 55840867 in words is "fifty-five million, eight hundred forty thousand, eight hundred sixty-seven".