39189240 has 96 divisors (see below), whose sum is σ = 132930720. Its totient is φ = 9993984.

The previous prime is 39189221. The next prime is 39189257. The reversal of 39189240 is 4298193.

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 = 39189195 and 39189204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5914 + ... + 10646.

It is an arithmetic number, because the mean of its divisors is an integer number (1384695).

Almost surely, 2^39189240 is an apocalyptic number.

39189240 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 39189240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66465360).

39189240 is an abundant number, since it is smaller than the sum of its proper divisors (93741480).

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

39189240 is a wasteful number, since it uses less digits than its factorization.

39189240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4773 (or 4766 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 39189240 is about 6260.1309890449. The cubic root of 39189240 is about 339.6687662232.

The spelling of 39189240 in words is "thirty-nine million, one hundred eighty-nine thousand, two hundred forty".