39440990 has 32 divisors (see below), whose sum is σ = 74870784. Its totient is φ = 14937120.

The previous prime is 39440983. The next prime is 39441007. The reversal of 39440990 is 9904493.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13217 + ... + 15923.

It is an arithmetic number, because the mean of its divisors is an integer number (2339712).

Almost surely, 2^39440990 is an apocalyptic number.

39440990 is a deficient number, since it is larger than the sum of its proper divisors (35429794).

39440990 is a wasteful number, since it uses less digits than its factorization.

39440990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2792.

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 39440990 is about 6280.2062068056. The cubic root of 39440990 is about 340.3945534967.

The spelling of 39440990 in words is "thirty-nine million, four hundred forty thousand, nine hundred ninety".