38469840 has 80 divisors (see below), whose sum is σ = 120825600. Its totient is φ = 10123776.

The previous prime is 38469811. The next prime is 38469841. The reversal of 38469840 is 4896483.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 38469792 and 38469801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38469841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17946 + ... + 19974.

It is an arithmetic number, because the mean of its divisors is an integer number (1510320).

Almost surely, 2^38469840 is an apocalyptic number.

38469840 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 38469840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60412800).

38469840 is an abundant number, since it is smaller than the sum of its proper divisors (82355760).

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

38469840 is a wasteful number, since it uses less digits than its factorization.

38469840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2124 (or 2118 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 42.

The square root of 38469840 is about 6202.4059847772. The cubic root of 38469840 is about 337.5774746694.

The spelling of 38469840 in words is "thirty-eight million, four hundred sixty-nine thousand, eight hundred forty".