38491712 has 56 divisors (see below), whose sum is σ = 88026240. Its totient is φ = 16358400.

The previous prime is 38491711. The next prime is 38491721. The reversal of 38491712 is 21719483.

It is a tau number, because it is divible by the number of its divisors (56).

It is a super-2 number, since 2×38491712² = 2963223785381888, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38491711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67364 + ... + 67932.

Almost surely, 2^38491712 is an apocalyptic number.

38491712 is a gapful number since it is divisible by the number (32) 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 38491712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44013120).

38491712 is an abundant number, since it is smaller than the sum of its proper divisors (49534528).

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

38491712 is a wasteful number, since it uses less digits than its factorization.

38491712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 739 (or 729 counting only the distinct ones).

The product of its digits is 12096, while the sum is 35.

The square root of 38491712 is about 6204.1689209756. The cubic root of 38491712 is about 337.6414390258.

The spelling of 38491712 in words is "thirty-eight million, four hundred ninety-one thousand, seven hundred twelve".