402005547 has 6 divisors (see below), whose sum is σ = 580674692. Its totient is φ = 268003692.

The previous prime is 402005543. The next prime is 402005557. The reversal of 402005547 is 745500204.

It is not a de Polignac number, because 402005547 - 2² = 402005543 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 402005547.

It is not an unprimeable number, because it can be changed into a prime (402005543) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22333633 + ... + 22333650.

Almost surely, 2^402005547 is an apocalyptic number.

402005547 is a deficient number, since it is larger than the sum of its proper divisors (178669145).

402005547 is a wasteful number, since it uses less digits than its factorization.

402005547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44667289 (or 44667286 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 27.

The square root of 402005547 is about 20050.0759848934. The cubic root of 402005547 is about 738.0356637755.

The spelling of 402005547 in words is "four hundred two million, five thousand, five hundred forty-seven".