39406860 has 72 divisors (see below), whose sum is σ = 121212000. Its totient is φ = 10361088.

The previous prime is 39406849. The next prime is 39406883. The reversal of 39406860 is 6860493.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11641 + ... + 14639.

It is an arithmetic number, because the mean of its divisors is an integer number (1683500).

Almost surely, 2^39406860 is an apocalyptic number.

39406860 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 39406860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60606000).

39406860 is an abundant number, since it is smaller than the sum of its proper divisors (81805140).

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

39406860 is a wasteful number, since it uses less digits than its factorization.

39406860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3087 (or 3082 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 39406860 is about 6277.4883512437. The cubic root of 39406860 is about 340.2963391026.

The spelling of 39406860 in words is "thirty-nine million, four hundred six thousand, eight hundred sixty".