38847240 has 144 divisors (see below), whose sum is σ = 132783300. Its totient is φ = 9838080.

The previous prime is 38847217. The next prime is 38847271. The reversal of 38847240 is 4274883.

It can be written as a sum of positive squares in 6 ways, for example, as 580644 + 38266596 = 762^2 + 6186^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 38847195 and 38847204.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 636810 + ... + 636870.

Almost surely, 2^38847240 is an apocalyptic number.

38847240 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 38847240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66391650).

38847240 is an abundant number, since it is smaller than the sum of its proper divisors (93936060).

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

38847240 is a wasteful number, since it uses less digits than its factorization.

38847240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168 (or 100 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The square root of 38847240 is about 6232.7554099291. The cubic root of 38847240 is about 338.6777944622.

The spelling of 38847240 in words is "thirty-eight million, eight hundred forty-seven thousand, two hundred forty".