38404520 has 128 divisors (see below), whose sum is σ = 110972160. Its totient is φ = 11612160.

The previous prime is 38404517. The next prime is 38404523. The reversal of 38404520 is 2540483.

It is an interprime number because it is at equal distance from previous prime (38404517) and next prime (38404523).

It is a self number, because there is not a number n which added to its sum of digits gives 38404520.

It is not an unprimeable number, because it can be changed into a prime (38404523) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 113792 + ... + 114128.

It is an arithmetic number, because the mean of its divisors is an integer number (866970).

Almost surely, 2^38404520 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 38404520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55486080).

38404520 is an abundant number, since it is smaller than the sum of its proper divisors (72567640).

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

38404520 is a wasteful number, since it uses less digits than its factorization.

38404520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403 (or 399 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 38404520 is about 6197.1380491320. The cubic root of 38404520 is about 337.3863028085.

The spelling of 38404520 in words is "thirty-eight million, four hundred four thousand, five hundred twenty".