42730906 has 8 divisors (see below), whose sum is σ = 65587104. Its totient is φ = 20868540.

The previous prime is 42730903. The next prime is 42730913. The reversal of 42730906 is 60903724.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (42730901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 248350 + ... + 248521.

It is an arithmetic number, because the mean of its divisors is an integer number (8198388).

Almost surely, 2^42730906 is an apocalyptic number.

42730906 is a deficient number, since it is larger than the sum of its proper divisors (22856198).

42730906 is a wasteful number, since it uses less digits than its factorization.

42730906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496916.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 42730906 is about 6536.8880975583. Note that the first 3 decimals coincide. The cubic root of 42730906 is about 349.6074674138.

The spelling of 42730906 in words is "forty-two million, seven hundred thirty thousand, nine hundred six".