39994740 has 36 divisors (see below), whose sum is σ = 121317924. Its totient is φ = 10665216.

The previous prime is 39994709. The next prime is 39994763. The reversal of 39994740 is 4749993.

It can be written as a sum of positive squares in 2 ways, for example, as 14653584 + 25341156 = 3828^2 + 5034^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 110917 + ... + 111276.

Almost surely, 2^39994740 is an apocalyptic number.

39994740 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

39994740 is an abundant number, since it is smaller than the sum of its proper divisors (81323184).

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

39994740 is a wasteful number, since it uses less digits than its factorization.

39994740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222208 (or 222203 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 39994740 is about 6324.1394671528. The cubic root of 39994740 is about 341.9801978891.

The spelling of 39994740 in words is "thirty-nine million, nine hundred ninety-four thousand, seven hundred forty".