153996638 has 8 divisors (see below), whose sum is σ = 241038288. Its totient is φ = 73650544.

The previous prime is 153996637. The next prime is 153996643. The reversal of 153996638 is 836699351.

153996638 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (153996637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1673831 + ... + 1673922.

It is an arithmetic number, because the mean of its divisors is an integer number (30129786).

Almost surely, 2^153996638 is an apocalyptic number.

153996638 is a deficient number, since it is larger than the sum of its proper divisors (87041650).

153996638 is a wasteful number, since it uses less digits than its factorization.

153996638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3347778.

The product of its digits is 1049760, while the sum is 50.

The square root of 153996638 is about 12409.5381864113. The cubic root of 153996638 is about 536.0069404871.

The spelling of 153996638 in words is "one hundred fifty-three million, nine hundred ninety-six thousand, six hundred thirty-eight".