1448503991 has 8 divisors (see below), whose sum is σ = 1580611968. Its totient is φ = 1316467000.

The previous prime is 1448503963. The next prime is 1448503993. The reversal of 1448503991 is 1993058441.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1448503991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1448503993) 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, 30686 + ... + 61956.

It is an arithmetic number, because the mean of its divisors is an integer number (197576496).

Almost surely, 2^1448503991 is an apocalyptic number.

1448503991 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1448503991 is a deficient number, since it is larger than the sum of its proper divisors (132107977).

1448503991 is a wasteful number, since it uses less digits than its factorization.

1448503991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35493.

The product of its (nonzero) digits is 155520, while the sum is 44.

The square root of 1448503991 is about 38059.2168994581. The cubic root of 1448503991 is about 1131.4618069425.

It can be divided in two parts, 144850 and 3991, that added together give a palindrome (148841).

The spelling of 1448503991 in words is "one billion, four hundred forty-eight million, five hundred three thousand, nine hundred ninety-one".