38684520 has 384 divisors, whose sum is σ = 162518400. Its totient is φ = 8128512.

The previous prime is 38684501. The next prime is 38684599. The reversal of 38684520 is 2548683.

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

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 899619 + ... + 899661.

It is an arithmetic number, because the mean of its divisors is an integer number (423225).

Almost surely, 2^38684520 is an apocalyptic number.

38684520 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 38684520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81259200).

38684520 is an abundant number, since it is smaller than the sum of its proper divisors (123833880).

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

38684520 is a wasteful number, since it uses less digits than its factorization.

38684520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94 (or 77 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 38684520 is about 6219.6880950736. The cubic root of 38684520 is about 338.2042578053.

It can be divided in two parts, 38684 and 520, that added together give a square (39204 = 198²).

The spelling of 38684520 in words is "thirty-eight million, six hundred eighty-four thousand, five hundred twenty".