38157621 has 16 divisors (see below), whose sum is σ = 54804480. Its totient is φ = 23546160.

The previous prime is 38157589. The next prime is 38157629. The reversal of 38157621 is 12675183.

38157621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 38157621 - 2⁵ = 38157589 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38157629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6781 + ... + 11058.

It is an arithmetic number, because the mean of its divisors is an integer number (3425280).

Almost surely, 2^38157621 is an apocalyptic number.

38157621 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

38157621 is a deficient number, since it is larger than the sum of its proper divisors (16646859).

38157621 is a wasteful number, since it uses less digits than its factorization.

38157621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17896.

The product of its digits is 10080, while the sum is 33.

The square root of 38157621 is about 6177.1855241688. The cubic root of 38157621 is about 336.6617397355.

The spelling of 38157621 in words is "thirty-eight million, one hundred fifty-seven thousand, six hundred twenty-one".