38872240 has 80 divisors (see below), whose sum is σ = 99565056. Its totient is φ = 13996800.

The previous prime is 38872199. The next prime is 38872247. The reversal of 38872240 is 4227883.

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

It is a super-2 number, since 2×38872240² = 3022102085235200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 38872196 and 38872205.

It is not an unprimeable number, because it can be changed into a prime (38872247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143305 + ... + 143575.

Almost surely, 2^38872240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 38872240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49782528).

38872240 is an abundant number, since it is smaller than the sum of its proper divisors (60692816).

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

38872240 is a wasteful number, since it uses less digits than its factorization.

38872240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458 (or 452 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 38872240 is about 6234.7606209060. The cubic root of 38872240 is about 338.7504305038.

It can be divided in two parts, 38 and 872240, that added together give a palindrome (872278).

The spelling of 38872240 in words is "thirty-eight million, eight hundred seventy-two thousand, two hundred forty".