38780520 has 128 divisors (see below), whose sum is σ = 124675200. Its totient is φ = 9621504.

The previous prime is 38780513. The next prime is 38780537. The reversal of 38780520 is 2508783.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 166324 + ... + 166556.

It is an arithmetic number, because the mean of its divisors is an integer number (974025).

Almost surely, 2^38780520 is an apocalyptic number.

38780520 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 38780520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62337600).

38780520 is an abundant number, since it is smaller than the sum of its proper divisors (85894680).

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

38780520 is a wasteful number, since it uses less digits than its factorization.

38780520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339 (or 335 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 38780520 is about 6227.4007418826. The cubic root of 38780520 is about 338.4837907069.

The spelling of 38780520 in words is "thirty-eight million, seven hundred eighty thousand, five hundred twenty".