400136254 has 40 divisors (see below), whose sum is σ = 707868720. Its totient is φ = 169612128.

The previous prime is 400136227. The next prime is 400136279. The reversal of 400136254 is 452631004.

It is a congruent number.

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 19 ways as a sum of consecutive naturals, for example, 494202 + ... + 495010.

It is an arithmetic number, because the mean of its divisors is an integer number (17696718).

Almost surely, 2^400136254 is an apocalyptic number.

400136254 is a deficient number, since it is larger than the sum of its proper divisors (307732466).

400136254 is an equidigital number, since it uses as much as digits as its factorization.

400136254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 942 (or 921 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 400136254 is about 20003.4060599689. The cubic root of 400136254 is about 736.8899509019.

Adding to 400136254 its reverse (452631004), we get a palindrome (852767258).

The spelling of 400136254 in words is "four hundred million, one hundred thirty-six thousand, two hundred fifty-four".