400103445 has 16 divisors (see below), whose sum is σ = 731617920. Its totient is φ = 182904384.

The previous prime is 400103441. The next prime is 400103471. The reversal of 400103445 is 544301004.

It is not a de Polignac number, because 400103445 - 2² = 400103441 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400103441) 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, 1905150 + ... + 1905359.

It is an arithmetic number, because the mean of its divisors is an integer number (45726120).

Almost surely, 2^400103445 is an apocalyptic number.

It is an amenable number.

400103445 is a deficient number, since it is larger than the sum of its proper divisors (331514475).

400103445 is a wasteful number, since it uses less digits than its factorization.

400103445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3810524.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 400103445 is about 20002.5859578206. The cubic root of 400103445 is about 736.8698100266.

Adding to 400103445 its reverse (544301004), we get a palindrome (944404449).

The spelling of 400103445 in words is "four hundred million, one hundred three thousand, four hundred forty-five".