38971650 has 144 divisors (see below), whose sum is σ = 109635840. Its totient is φ = 9139200.

The previous prime is 38971577. The next prime is 38971651. The reversal of 38971650 is 5617983.

It is a junction number, because it is equal to n+sod(n) for n = 38971599 and 38971608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38971651) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1257135 + ... + 1257165.

It is an arithmetic number, because the mean of its divisors is an integer number (761360).

Almost surely, 2^38971650 is an apocalyptic number.

38971650 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 38971650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54817920).

38971650 is an abundant number, since it is smaller than the sum of its proper divisors (70664190).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

38971650 is a wasteful number, since it uses less digits than its factorization.

38971650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109 (or 87 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 38971650 is about 6242.7277691727. The cubic root of 38971650 is about 339.0389527207.

It can be divided in two parts, 38971 and 650, that added together give a triangular number (39621 = T₂₈₁).

The spelling of 38971650 in words is "thirty-eight million, nine hundred seventy-one thousand, six hundred fifty".