405497727 has 12 divisors (see below), whose sum is σ = 585893880. Its totient is φ = 270251088.

The previous prime is 405497711. The next prime is 405497731. The reversal of 405497727 is 727794504.

It is not a de Polignac number, because 405497727 - 2⁴ = 405497711 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405497777) 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, 52828 + ... + 60014.

It is an arithmetic number, because the mean of its divisors is an integer number (48824490).

Almost surely, 2^405497727 is an apocalyptic number.

405497727 is a deficient number, since it is larger than the sum of its proper divisors (180396153).

405497727 is a wasteful number, since it uses less digits than its factorization.

405497727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13462 (or 13459 counting only the distinct ones).

The product of its (nonzero) digits is 493920, while the sum is 45.

The square root of 405497727 is about 20136.9741272119. The cubic root of 405497727 is about 740.1665847269.

The spelling of 405497727 in words is "four hundred five million, four hundred ninety-seven thousand, seven hundred twenty-seven".