38909280 has 96 divisors (see below), whose sum is σ = 123911424. Its totient is φ = 10262016.

The previous prime is 38909251. The next prime is 38909291. The reversal of 38909280 is 8290983.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49047 + ... + 49833.

It is an arithmetic number, because the mean of its divisors is an integer number (1290744).

Almost surely, 2^38909280 is an apocalyptic number.

38909280 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 38909280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61955712).

38909280 is an abundant number, since it is smaller than the sum of its proper divisors (85002144).

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

38909280 is a wasteful number, since it uses less digits than its factorization.

38909280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 908 (or 900 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 38909280 is about 6237.7303564678. The cubic root of 38909280 is about 338.8579908326.

The spelling of 38909280 in words is "thirty-eight million, nine hundred nine thousand, two hundred eighty".