1990037225 has 12 divisors (see below), whose sum is σ = 2691978000. Its totient is φ = 1447299600.

The previous prime is 1990037173. The next prime is 1990037227. The reversal of 1990037225 is 5227300991.

It is not a de Polignac number, because 1990037225 - 2⁸ = 1990036969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1990037227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3617975 + ... + 3618524.

It is an arithmetic number, because the mean of its divisors is an integer number (224331500).

Almost surely, 2^1990037225 is an apocalyptic number.

It is an amenable number.

1990037225 is a deficient number, since it is larger than the sum of its proper divisors (701940775).

1990037225 is a wasteful number, since it uses less digits than its factorization.

1990037225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7236520 (or 7236515 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 1990037225 is about 44609.8332769805. The cubic root of 1990037225 is about 1257.8255148197.

The spelling of 1990037225 in words is "one billion, nine hundred ninety million, thirty-seven thousand, two hundred twenty-five".