545390406 has 24 divisors (see below), whose sum is σ = 1289105064. Its totient is φ = 165269760.

The previous prime is 545390399. The next prime is 545390423. The reversal of 545390406 is 604093545.

It is a happy number.

It is a Curzon number.

It is a congruent number.

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, 1377051 + ... + 1377446.

It is an arithmetic number, because the mean of its divisors is an integer number (53712711).

Almost surely, 2^545390406 is an apocalyptic number.

545390406 is an abundant number, since it is smaller than the sum of its proper divisors (743714658).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

545390406 is a wasteful number, since it uses less digits than its factorization.

545390406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2754516 (or 2754513 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 545390406 is about 23353.5951407915. The cubic root of 545390406 is about 817.0259137125.

It can be divided in two parts, 5453 and 90406, that added together give a palindrome (95859).

The spelling of 545390406 in words is "five hundred forty-five million, three hundred ninety thousand, four hundred six".