542397906 has 12 divisors (see below), whose sum is σ = 1175195502. Its totient is φ = 180799296.

The previous prime is 542397901. The next prime is 542397923. The reversal of 542397906 is 609793245.

It is a happy number.

542397906 is a `hidden beast` number, since 542 + 39 + 79 + 0 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 277522281 + 264875625 = 16659^2 + 16275^2 .

It is not an unprimeable number, because it can be changed into a prime (542397901) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15066591 + ... + 15066626.

Almost surely, 2^542397906 is an apocalyptic number.

542397906 is an abundant number, since it is smaller than the sum of its proper divisors (632797596).

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

542397906 is a wasteful number, since it uses less digits than its factorization.

542397906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30133225 (or 30133222 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 45.

The square root of 542397906 is about 23289.4376488570. The cubic root of 542397906 is about 815.5288604523.

The spelling of 542397906 in words is "five hundred forty-two million, three hundred ninety-seven thousand, nine hundred six".