38660220 has 48 divisors (see below), whose sum is σ = 120277920. Its totient is φ = 10309248.

The previous prime is 38660213. The next prime is 38660221. The reversal of 38660220 is 2206683.

38660220 is a `hidden beast` number, since 38 + 6 + 602 + 20 = 666.

It is a super-2 number, since 2×38660220² = 2989225220896800, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38660221) 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, 35257 + ... + 36336.

It is an arithmetic number, because the mean of its divisors is an integer number (2505790).

Almost surely, 2^38660220 is an apocalyptic number.

38660220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

38660220 is an abundant number, since it is smaller than the sum of its proper divisors (81617700).

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

38660220 is a wasteful number, since it uses less digits than its factorization.

38660220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71611 (or 71603 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 38660220 is about 6217.7343140408. The cubic root of 38660220 is about 338.1334277086.

It can be divided in two parts, 386 and 60220, that added together give a palindrome (60606).

The spelling of 38660220 in words is "thirty-eight million, six hundred sixty thousand, two hundred twenty".