542294640 has 60 divisors (see below), whose sum is σ = 1821208584. Its totient is φ = 144611712.

The previous prime is 542294639. The next prime is 542294647. The reversal of 542294640 is 46492245.

542294640 is a `hidden beast` number, since 5 + 4 + 2 + 2 + 9 + 4 + 640 = 666.

It is a tau number, because it is divible by the number of its divisors (60).

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 = 542294595 and 542294604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542294647) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 375874 + ... + 377313.

Almost surely, 2^542294640 is an apocalyptic number.

It is an amenable number.

542294640 is an abundant number, since it is smaller than the sum of its proper divisors (1278913944).

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

542294640 is a wasteful number, since it uses less digits than its factorization.

542294640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753206 (or 753197 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 542294640 is about 23287.2205297240. The cubic root of 542294640 is about 815.4771015575.

The spelling of 542294640 in words is "five hundred forty-two million, two hundred ninety-four thousand, six hundred forty".