71730406 has 8 divisors (see below), whose sum is σ = 117377064. Its totient is φ = 32604720.

The previous prime is 71730391. The next prime is 71730409. The reversal of 71730406 is 60403717.

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

It is a super-2 number, since 2×71730406² = 10290502289849672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71730409) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1630215 + ... + 1630258.

It is an arithmetic number, because the mean of its divisors is an integer number (14672133).

Almost surely, 2^71730406 is an apocalyptic number.

71730406 is a deficient number, since it is larger than the sum of its proper divisors (45646658).

71730406 is a wasteful number, since it uses less digits than its factorization.

71730406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3260486.

The product of its (nonzero) digits is 3528, while the sum is 28.

The square root of 71730406 is about 8469.3804968250. The cubic root of 71730406 is about 415.4968761878.

The spelling of 71730406 in words is "seventy-one million, seven hundred thirty thousand, four hundred six".