38721996 has 48 divisors (see below), whose sum is σ = 101001600. Its totient is φ = 12828816.

The previous prime is 38721983. The next prime is 38722027. The reversal of 38721996 is 69912783.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18331 + ... + 20333.

It is an arithmetic number, because the mean of its divisors is an integer number (2104200).

Almost surely, 2^38721996 is an apocalyptic number.

38721996 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 38721996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50500800).

38721996 is an abundant number, since it is smaller than the sum of its proper divisors (62279604).

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

38721996 is a wasteful number, since it uses less digits than its factorization.

38721996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2195 (or 2187 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 38721996 is about 6222.7000570492. The cubic root of 38721996 is about 338.3134354308.

The spelling of 38721996 in words is "thirty-eight million, seven hundred twenty-one thousand, nine hundred ninety-six".