542865840 has 160 divisors (see below), whose sum is σ = 1866523392. Its totient is φ = 129408000.

The previous prime is 542865821. The next prime is 542865847. The reversal of 542865840 is 48568245.

It is a junction number, because it is equal to n+sod(n) for n = 542865792 and 542865801.

It is not an unprimeable number, because it can be changed into a prime (542865847) 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, 159355 + ... + 162725.

Almost surely, 2^542865840 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 542865840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (933261696).

542865840 is an abundant number, since it is smaller than the sum of its proper divisors (1323657552).

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

542865840 is a wasteful number, since it uses less digits than its factorization.

542865840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3459 (or 3453 counting only the distinct ones).

The product of its (nonzero) digits is 307200, while the sum is 42.

The square root of 542865840 is about 23299.4815392961. The cubic root of 542865840 is about 815.7633156306.

The spelling of 542865840 in words is "five hundred forty-two million, eight hundred sixty-five thousand, eight hundred forty".