39894840 has 48 divisors (see below), whose sum is σ = 129659400. Its totient is φ = 10638528.

The previous prime is 39894821. The next prime is 39894847. The reversal of 39894840 is 4849893.

It is a happy number.

39894840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39894847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55050 + ... + 55769.

Almost surely, 2^39894840 is an apocalyptic number.

39894840 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

39894840 is an abundant number, since it is smaller than the sum of its proper divisors (89764560).

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

39894840 is a wasteful number, since it uses less digits than its factorization.

39894840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110836 (or 110829 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 39894840 is about 6316.2362210418. The cubic root of 39894840 is about 341.6952245281.

The spelling of 39894840 in words is "thirty-nine million, eight hundred ninety-four thousand, eight hundred forty".