405772011 has 20 divisors (see below), whose sum is σ = 611727600. Its totient is φ = 268027056.

The previous prime is 405771991. The next prime is 405772043. The reversal of 405772011 is 110277504.

It is not a de Polignac number, because 405772011 - 2⁵ = 405771979 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (405772111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 14151 + ... + 31808.

It is an arithmetic number, because the mean of its divisors is an integer number (30586380).

Almost surely, 2^405772011 is an apocalyptic number.

405772011 is a deficient number, since it is larger than the sum of its proper divisors (205955589).

405772011 is a wasteful number, since it uses less digits than its factorization.

405772011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46080 (or 46071 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 27.

The square root of 405772011 is about 20143.7834331091. The cubic root of 405772011 is about 740.3334332532. Note that the first 3 decimals are identical.

The spelling of 405772011 in words is "four hundred five million, seven hundred seventy-two thousand, eleven".