400145415 has 32 divisors (see below), whose sum is σ = 677445120. Its totient is φ = 201124224.

The previous prime is 400145411. The next prime is 400145423. The reversal of 400145415 is 514541004.

It is a happy number.

It is not a de Polignac number, because 400145415 - 2² = 400145411 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400145411) 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 31 ways as a sum of consecutive naturals, for example, 52582 + ... + 59708.

It is an arithmetic number, because the mean of its divisors is an integer number (21170160).

Almost surely, 2^400145415 is an apocalyptic number.

400145415 is a deficient number, since it is larger than the sum of its proper divisors (277299705).

400145415 is a wasteful number, since it uses less digits than its factorization.

400145415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7351.

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 400145415 is about 20003.6350446613. The cubic root of 400145415 is about 736.8955744841.

Adding to 400145415 its reverse (514541004), we get a palindrome (914686419).

The spelling of 400145415 in words is "four hundred million, one hundred forty-five thousand, four hundred fifteen".