1445252638 has 8 divisors (see below), whose sum is σ = 2188139832. Its totient is φ = 715872696.

The previous prime is 1445252629. The next prime is 1445252657. The reversal of 1445252638 is 8362525441.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1445252638.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3376545 + ... + 3376972.

It is an arithmetic number, because the mean of its divisors is an integer number (273517479).

Almost surely, 2^1445252638 is an apocalyptic number.

1445252638 is a deficient number, since it is larger than the sum of its proper divisors (742887194).

1445252638 is a wasteful number, since it uses less digits than its factorization.

1445252638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6753626.

The product of its digits is 230400, while the sum is 40.

The square root of 1445252638 is about 38016.4785060374. The cubic root of 1445252638 is about 1130.6146023553.

The spelling of 1445252638 in words is "one billion, four hundred forty-five million, two hundred fifty-two thousand, six hundred thirty-eight".