38841840 has 120 divisors (see below), whose sum is σ = 132409680. Its totient is φ = 10202112.

The previous prime is 38841839. The next prime is 38841841. The reversal of 38841840 is 4814883.

It is an interprime number because it is at equal distance from previous prime (38841839) and next prime (38841841).

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 38841795 and 38841804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38841841) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52191 + ... + 52929.

It is an arithmetic number, because the mean of its divisors is an integer number (1103414).

Almost surely, 2^38841840 is an apocalyptic number.

38841840 is a gapful number since it is divisible by the number (30) 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 38841840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66204840).

38841840 is an abundant number, since it is smaller than the sum of its proper divisors (93567840).

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

38841840 is a wasteful number, since it uses less digits than its factorization.

38841840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 831 (or 822 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 36.

The square root of 38841840 is about 6232.3221996299. The cubic root of 38841840 is about 338.6621009849.

The spelling of 38841840 in words is "thirty-eight million, eight hundred forty-one thousand, eight hundred forty".