39128340 has 48 divisors (see below), whose sum is σ = 109876032. Its totient is φ = 10404096.

The previous prime is 39128333. The next prime is 39128347. The reversal of 39128340 is 4382193.

It is an interprime number because it is at equal distance from previous prime (39128333) and next prime (39128347).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 39128298 and 39128307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39128347) 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, 26707 + ... + 28133.

It is an arithmetic number, because the mean of its divisors is an integer number (2289084).

Almost surely, 2^39128340 is an apocalyptic number.

39128340 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

39128340 is an abundant number, since it is smaller than the sum of its proper divisors (70747692).

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

39128340 is a wasteful number, since it uses less digits than its factorization.

39128340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1896 (or 1894 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 39128340 is about 6255.2649823968. The cubic root of 39128340 is about 339.4927268106.

The spelling of 39128340 in words is "thirty-nine million, one hundred twenty-eight thousand, three hundred forty".