38491650 has 72 divisors (see below), whose sum is σ = 107939520. Its totient is φ = 9815520.

The previous prime is 38491601. The next prime is 38491693. The reversal of 38491650 is 5619483.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 8491 + ... + 12209.

It is an arithmetic number, because the mean of its divisors is an integer number (1499160).

Almost surely, 2^38491650 is an apocalyptic number.

38491650 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 38491650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53969760).

38491650 is an abundant number, since it is smaller than the sum of its proper divisors (69447870).

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

38491650 is a wasteful number, since it uses less digits than its factorization.

With its successor (38491651) it forms an eRAP, since the sums of their prime factors are consecutive (3760 and 3761).

38491650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3760 (or 3752 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 38491650 is about 6204.1639243334. The cubic root of 38491650 is about 337.6412577420.

The spelling of 38491650 in words is "thirty-eight million, four hundred ninety-one thousand, six hundred fifty".