154401638 has 16 divisors (see below), whose sum is σ = 251658240. Its totient is φ = 70777800.

The previous prime is 154401631. The next prime is 154401649. The reversal of 154401638 is 836104451.

154401638 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154401631) 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 7 ways as a sum of consecutive naturals, for example, 64358 + ... + 66713.

It is an arithmetic number, because the mean of its divisors is an integer number (15728640).

Almost surely, 2^154401638 is an apocalyptic number.

154401638 is a deficient number, since it is larger than the sum of its proper divisors (97256602).

154401638 is a wasteful number, since it uses less digits than its factorization.

154401638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131123.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 154401638 is about 12425.8455647895. The cubic root of 154401638 is about 536.4764156377.

The spelling of 154401638 in words is "one hundred fifty-four million, four hundred one thousand, six hundred thirty-eight".