1449003780 has 144 divisors (see below), whose sum is σ = 5087147520. Its totient is φ = 326985984.

The previous prime is 1449003769. The next prime is 1449003781. The reversal of 1449003780 is 873009441.

It is a happy number.

It is a super-2 number, since 2×1449003780² = 4199223908908576800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1449003781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 92262 + ... + 106818.

Almost surely, 2^1449003780 is an apocalyptic number.

1449003780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1449003780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2543573760).

1449003780 is an abundant number, since it is smaller than the sum of its proper divisors (3638143740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1449003780 is a wasteful number, since it uses less digits than its factorization.

1449003780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14658 (or 14653 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 1449003780 is about 38065.7822722718. The cubic root of 1449003780 is about 1131.5919244390.

The spelling of 1449003780 in words is "one billion, four hundred forty-nine million, three thousand, seven hundred eighty".