402005445 has 16 divisors (see below), whose sum is σ = 646098432. Its totient is φ = 213439680.

The previous prime is 402005413. The next prime is 402005447. The reversal of 402005445 is 544500204.

It is not a de Polignac number, because 402005445 - 2⁵ = 402005413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402005447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56746 + ... + 63435.

It is an arithmetic number, because the mean of its divisors is an integer number (40381152).

Almost surely, 2^402005445 is an apocalyptic number.

It is an amenable number.

402005445 is a deficient number, since it is larger than the sum of its proper divisors (244092987).

402005445 is a wasteful number, since it uses less digits than its factorization.

402005445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120412.

The product of its (nonzero) digits is 3200, while the sum is 24.

The square root of 402005445 is about 20050.0734412620. The cubic root of 402005445 is about 738.0356013554.

Adding to 402005445 its reverse (544500204), we get a palindrome (946505649).

The spelling of 402005445 in words is "four hundred two million, five thousand, four hundred forty-five".