1445091998 has 16 divisors (see below), whose sum is σ = 2479966944. Its totient is φ = 618658560.

The previous prime is 1445091997. The next prime is 1445092049. The reversal of 1445091998 is 8991905441.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1445091997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41963 + ... + 68198.

It is an arithmetic number, because the mean of its divisors is an integer number (154997934).

Almost surely, 2^1445091998 is an apocalyptic number.

1445091998 is a deficient number, since it is larger than the sum of its proper divisors (1034874946).

1445091998 is a wasteful number, since it uses less digits than its factorization.

1445091998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111107.

The product of its (nonzero) digits is 466560, while the sum is 50.

The square root of 1445091998 is about 38014.3656793060. The cubic root of 1445091998 is about 1130.5727114881.

The spelling of 1445091998 in words is "one billion, four hundred forty-five million, ninety-one thousand, nine hundred ninety-eight".