405352026 has 20 divisors (see below), whose sum is σ = 908289162. Its totient is φ = 135117288.

The previous prime is 405352009. The next prime is 405352037. The reversal of 405352026 is 620253504.

It can be written as a sum of positive squares in only one way, i.e., 370601001 + 34751025 = 19251^2 + 5895^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1250925 + ... + 1251248.

Almost surely, 2^405352026 is an apocalyptic number.

405352026 is an abundant number, since it is smaller than the sum of its proper divisors (502937136).

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

405352026 is a wasteful number, since it uses less digits than its factorization.

405352026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2502187 (or 2502178 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 405352026 is about 20133.3560540711. The cubic root of 405352026 is about 740.0779233745.

The spelling of 405352026 in words is "four hundred five million, three hundred fifty-two thousand, twenty-six".