400124385 has 24 divisors (see below), whose sum is σ = 695670144. Its totient is φ = 212747040.

The previous prime is 400124369. The next prime is 400124411. The reversal of 400124385 is 583421004.

It is not a de Polignac number, because 400124385 - 2⁴ = 400124369 is a prime.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 1464 + ... + 28326.

It is an arithmetic number, because the mean of its divisors is an integer number (28986256).

Almost surely, 2^400124385 is an apocalyptic number.

400124385 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

400124385 is a deficient number, since it is larger than the sum of its proper divisors (295545759).

400124385 is a wasteful number, since it uses less digits than its factorization.

400124385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27205 (or 27202 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 400124385 is about 20003.1093832934. The cubic root of 400124385 is about 736.8826648561.

Adding to 400124385 its reverse (583421004), we get a palindrome (983545389).

The spelling of 400124385 in words is "four hundred million, one hundred twenty-four thousand, three hundred eighty-five".