38113621 has 12 divisors (see below), whose sum is σ = 47747532. Its totient is φ = 30155328.

The previous prime is 38113619. The next prime is 38113631. The reversal of 38113621 is 12631183.

It can be written as a sum of positive squares in 2 ways, for example, as 22193521 + 15920100 = 4711^2 + 3990^2 .

It is not a de Polignac number, because 38113621 - 2¹ = 38113619 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38113631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29280 + ... + 30553.

It is an arithmetic number, because the mean of its divisors is an integer number (3978961).

Almost surely, 2^38113621 is an apocalyptic number.

It is an amenable number.

38113621 is a deficient number, since it is larger than the sum of its proper divisors (9633911).

38113621 is a wasteful number, since it uses less digits than its factorization.

38113621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59860 (or 59853 counting only the distinct ones).

The product of its digits is 864, while the sum is 25.

The square root of 38113621 is about 6173.6230043630. The cubic root of 38113621 is about 336.5322870990.

It can be divided in two parts, 3811 and 3621, that multiplied together give a triangular number (13799631 = T₅₂₅₃).

The spelling of 38113621 in words is "thirty-eight million, one hundred thirteen thousand, six hundred twenty-one".