1444666890 has 64 divisors (see below), whose sum is σ = 3498080256. Its totient is φ = 381832512.

The previous prime is 1444666889. The next prime is 1444666901. The reversal of 1444666890 is 986664441.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2232547 + ... + 2233193.

It is an arithmetic number, because the mean of its divisors is an integer number (54657504).

Almost surely, 2^1444666890 is an apocalyptic number.

1444666890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1444666890 is an abundant number, since it is smaller than the sum of its proper divisors (2053413366).

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

1444666890 is a wasteful number, since it uses less digits than its factorization.

1444666890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1203.

The product of its (nonzero) digits is 995328, while the sum is 48.

The square root of 1444666890 is about 38008.7738555192. The cubic root of 1444666890 is about 1130.4618390452.

The spelling of 1444666890 in words is "one billion, four hundred forty-four million, six hundred sixty-six thousand, eight hundred ninety".