39993705 has 24 divisors (see below), whose sum is σ = 69643080. Its totient is φ = 21231360.

The previous prime is 39993691. The next prime is 39993713. The reversal of 39993705 is 50739993.

It can be written as a sum of positive squares in 4 ways, for example, as 14561856 + 25431849 = 3816^2 + 5043^2 .

It is not a de Polignac number, because 39993705 - 2⁸ = 39993449 is a prime.

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

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, 8365 + ... + 12245.

It is an arithmetic number, because the mean of its divisors is an integer number (2901795).

Almost surely, 2^39993705 is an apocalyptic number.

It is an amenable number.

39993705 is a deficient number, since it is larger than the sum of its proper divisors (29649375).

39993705 is a wasteful number, since it uses less digits than its factorization.

39993705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4121 (or 4118 counting only the distinct ones).

The product of its (nonzero) digits is 229635, while the sum is 45.

The square root of 39993705 is about 6324.0576373085. The cubic root of 39993705 is about 341.9772478965.

The spelling of 39993705 in words is "thirty-nine million, nine hundred ninety-three thousand, seven hundred five".