39389220 has 192 divisors, whose sum is σ = 136980480. Its totient is φ = 9331200.

The previous prime is 39389209. The next prime is 39389239. The reversal of 39389220 is 2298393.

It is a super-3 number, since 3×39389220³ (a number of 24 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

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

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 217530 + ... + 217710.

It is an arithmetic number, because the mean of its divisors is an integer number (713440).

Almost surely, 2^39389220 is an apocalyptic number.

39389220 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 39389220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68490240).

39389220 is an abundant number, since it is smaller than the sum of its proper divisors (97591260).

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

39389220 is a wasteful number, since it uses less digits than its factorization.

39389220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243 (or 235 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 39389220 is about 6276.0831734450. The cubic root of 39389220 is about 340.2455550230.

The spelling of 39389220 in words is "thirty-nine million, three hundred eighty-nine thousand, two hundred twenty".