406042747 has 8 divisors (see below), whose sum is σ = 443171952. Its totient is φ = 368949600.

The previous prime is 406042733. The next prime is 406042757. The reversal of 406042747 is 747240604.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-406042747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (406042757) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18097 + ... + 33757.

It is an arithmetic number, because the mean of its divisors is an integer number (55396494).

Almost surely, 2^406042747 is an apocalyptic number.

406042747 is a deficient number, since it is larger than the sum of its proper divisors (37129205).

406042747 is a wasteful number, since it uses less digits than its factorization.

406042747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18029.

The product of its (nonzero) digits is 37632, while the sum is 34.

The square root of 406042747 is about 20150.5024006847. The cubic root of 406042747 is about 740.4980497915.

The spelling of 406042747 in words is "four hundred six million, forty-two thousand, seven hundred forty-seven".