400265445 has 16 divisors (see below), whose sum is σ = 657734400. Its totient is φ = 207705024.

The previous prime is 400265443. The next prime is 400265473. The reversal of 400265445 is 544562004.

It is not a de Polignac number, because 400265445 - 2¹ = 400265443 is a prime.

It is a super-2 number, since 2×400265445² = 320424852922096050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400265443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 360045 + ... + 361154.

It is an arithmetic number, because the mean of its divisors is an integer number (41108400).

Almost surely, 2^400265445 is an apocalyptic number.

It is an amenable number.

400265445 is a deficient number, since it is larger than the sum of its proper divisors (257468955).

400265445 is a wasteful number, since it uses less digits than its factorization.

400265445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721244.

The product of its (nonzero) digits is 19200, while the sum is 30.

The square root of 400265445 is about 20006.6350244113. The cubic root of 400265445 is about 736.9692483120.

The spelling of 400265445 in words is "four hundred million, two hundred sixty-five thousand, four hundred forty-five".