925421990 has 32 divisors (see below), whose sum is σ = 1694135520. Its totient is φ = 363916800.

The previous prime is 925421989. The next prime is 925422007. The reversal of 925421990 is 99124529.

It is a happy number.

925421990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (41) 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, 139550 + ... + 146030.

It is an arithmetic number, because the mean of its divisors is an integer number (52941735).

Almost surely, 2^925421990 is an apocalyptic number.

925421990 is a deficient number, since it is larger than the sum of its proper divisors (768713530).

925421990 is a wasteful number, since it uses less digits than its factorization.

925421990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6728.

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 925421990 is about 30420.7493333087. The cubic root of 925421990 is about 974.4957252057.

The spelling of 925421990 in words is "nine hundred twenty-five million, four hundred twenty-one thousand, nine hundred ninety".