542519640 has 256 divisors, whose sum is σ = 2062972800. Its totient is φ = 125632512.

The previous prime is 542519629. The next prime is 542519741. The reversal of 542519640 is 46915245.

542519640 is a `hidden beast` number, since 5 + 4 + 2 + 5 + 1 + 9 + 640 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 542519595 and 542519604.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 237544 + ... + 239816.

Almost surely, 2^542519640 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 542519640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1031486400).

542519640 is an abundant number, since it is smaller than the sum of its proper divisors (1520453160).

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

542519640 is a wasteful number, since it uses less digits than its factorization.

542519640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2323 (or 2313 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 542519640 is about 23292.0510045809. The cubic root of 542519640 is about 815.5898674258.

The spelling of 542519640 in words is "five hundred forty-two million, five hundred nineteen thousand, six hundred forty".