38891280 has 80 divisors (see below), whose sum is σ = 121581504. Its totient is φ = 10283520.

The previous prime is 38891269. The next prime is 38891287. The reversal of 38891280 is 8219883.

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

It is not an unprimeable number, because it can be changed into a prime (38891287) by changing a digit.

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, 30822 + ... + 32058.

Almost surely, 2^38891280 is an apocalyptic number.

38891280 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 38891280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60790752).

38891280 is an abundant number, since it is smaller than the sum of its proper divisors (82690224).

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

38891280 is a wasteful number, since it uses less digits than its factorization.

38891280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1384 (or 1378 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 39.

The square root of 38891280 is about 6236.2873570739. The cubic root of 38891280 is about 338.8057292244.

The spelling of 38891280 in words is "thirty-eight million, eight hundred ninety-one thousand, two hundred eighty".