400010445 has 24 divisors (see below), whose sum is σ = 693868032. Its totient is φ = 213180000.

The previous prime is 400010431. The next prime is 400010509. The reversal of 400010445 is 544010004.

It is not a de Polignac number, because 400010445 - 2⁹ = 400009933 is a prime.

It is a super-2 number, since 2×400010445² = 320016712218196050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 81820 + ... + 86570.

It is an arithmetic number, because the mean of its divisors is an integer number (28911168).

Almost surely, 2^400010445 is an apocalyptic number.

400010445 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

400010445 is a deficient number, since it is larger than the sum of its proper divisors (293857587).

400010445 is a wasteful number, since it uses less digits than its factorization.

400010445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6633 (or 6630 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 400010445 is about 20000.2611232954. The cubic root of 400010445 is about 736.8127129571.

Adding to 400010445 its reverse (544010004), we get a palindrome (944020449).

The spelling of 400010445 in words is "four hundred million, ten thousand, four hundred forty-five".