38147220 has 96 divisors (see below), whose sum is σ = 121645440. Its totient is φ = 9918720.

The previous prime is 38147203. The next prime is 38147243. The reversal of 38147220 is 2274183.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

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, 21279 + ... + 23001.

It is an arithmetic number, because the mean of its divisors is an integer number (1267140).

Almost surely, 2^38147220 is an apocalyptic number.

38147220 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 38147220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60822720).

38147220 is an abundant number, since it is smaller than the sum of its proper divisors (83498220).

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

38147220 is a wasteful number, since it uses less digits than its factorization.

38147220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1782 (or 1774 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 38147220 is about 6176.3435785261. The cubic root of 38147220 is about 336.6311478829.

The spelling of 38147220 in words is "thirty-eight million, one hundred forty-seven thousand, two hundred twenty".