542533640 has 64 divisors (see below), whose sum is σ = 1336685760. Its totient is φ = 196542720.

The previous prime is 542533633. The next prime is 542533661. The reversal of 542533640 is 46335245.

It is a junction number, because it is equal to n+sod(n) for n = 542533597 and 542533606.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122342 + ... + 126698.

It is an arithmetic number, because the mean of its divisors is an integer number (20885715).

Almost surely, 2^542533640 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 542533640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (668342880).

542533640 is an abundant number, since it is smaller than the sum of its proper divisors (794152120).

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

542533640 is a wasteful number, since it uses less digits than its factorization.

542533640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4662 (or 4658 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 32.

The square root of 542533640 is about 23292.3515343556. The cubic root of 542533640 is about 815.5968829383.

Adding to 542533640 its reverse (46335245), we get a palindrome (588868885).

The spelling of 542533640 in words is "five hundred forty-two million, five hundred thirty-three thousand, six hundred forty".