405040957 has 4 divisors (see below), whose sum is σ = 405133920. Its totient is φ = 404947996.

The previous prime is 405040949. The next prime is 405040967. The reversal of 405040957 is 759040504.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 405040957 - 2³ = 405040949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405040907) 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, 39607 + ... + 48772.

It is an arithmetic number, because the mean of its divisors is an integer number (101283480).

Almost surely, 2^405040957 is an apocalyptic number.

It is an amenable number.

405040957 is a deficient number, since it is larger than the sum of its proper divisors (92963).

405040957 is an equidigital number, since it uses as much as digits as its factorization.

405040957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92962.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 405040957 is about 20125.6293566189. The cubic root of 405040957 is about 739.8885618654. Note that the first 3 decimals are identical.

The spelling of 405040957 in words is "four hundred five million, forty thousand, nine hundred fifty-seven".