1990850407 has 32 divisors (see below), whose sum is σ = 2536377984. Its totient is φ = 1520640000.

The previous prime is 1990850401. The next prime is 1990850413. The reversal of 1990850407 is 7040580991.

It is an interprime number because it is at equal distance from previous prime (1990850401) and next prime (1990850413).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1990850407 is a prime.

It is a Smith number, since the sum of its digits (43) 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 not an unprimeable number, because it can be changed into a prime (1990850401) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 359157 + ... + 364657.

It is an arithmetic number, because the mean of its divisors is an integer number (79261812).

Almost surely, 2^1990850407 is an apocalyptic number.

1990850407 is a deficient number, since it is larger than the sum of its proper divisors (545527577).

1990850407 is a wasteful number, since it uses less digits than its factorization.

1990850407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5659.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 1990850407 is about 44618.9467266990. The cubic root of 1990850407 is about 1257.9968184461.

The spelling of 1990850407 in words is "one billion, nine hundred ninety million, eight hundred fifty thousand, four hundred seven".