405769545 has 12 divisors (see below), whose sum is σ = 703333956. Its totient is φ = 216410400.

The previous prime is 405769501. The next prime is 405769577. The reversal of 405769545 is 545967504.

405769545 is a `hidden beast` number, since 40 + 5 + 7 + 69 + 545 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 241211961 + 164557584 = 15531^2 + 12828^2 .

It is not a de Polignac number, because 405769545 - 2¹⁰ = 405768521 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 9017101 = 405769545 / (4 + 0 + 5 + 7 + 6 + 9 + 5 + 4 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 405769545.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4508506 + ... + 4508595.

It is an arithmetic number, because the mean of its divisors is an integer number (58611163).

Almost surely, 2^405769545 is an apocalyptic number.

405769545 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

405769545 is a deficient number, since it is larger than the sum of its proper divisors (297564411).

405769545 is a wasteful number, since it uses less digits than its factorization.

405769545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9017112 (or 9017109 counting only the distinct ones).

The product of its (nonzero) digits is 756000, while the sum is 45.

The square root of 405769545 is about 20143.7222230649. The cubic root of 405769545 is about 740.3319335063.

The spelling of 405769545 in words is "four hundred five million, seven hundred sixty-nine thousand, five hundred forty-five".