991420592 has 40 divisors (see below), whose sum is σ = 1956084624. Its totient is φ = 486687744.

The previous prime is 991420583. The next prime is 991420643. The reversal of 991420592 is 295024199.

It is a happy number.

991420592 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 270323 + ... + 273965.

Almost surely, 2^991420592 is an apocalyptic number.

It is an amenable number.

991420592 is a deficient number, since it is larger than the sum of its proper divisors (964664032).

991420592 is a wasteful number, since it uses less digits than its factorization.

991420592 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3957 (or 3951 counting only the distinct ones).

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

The square root of 991420592 is about 31486.8320413471. The cubic root of 991420592 is about 997.1319796563.

The spelling of 991420592 in words is "nine hundred ninety-one million, four hundred twenty thousand, five hundred ninety-two".