1444456690 has 16 divisors (see below), whose sum is σ = 2670293592. Its totient is φ = 562166784.

The previous prime is 1444456661. The next prime is 1444456693. The reversal of 1444456690 is 966544441.

It can be written as a sum of positive squares in 4 ways, for example, as 1306605609 + 137851081 = 36147^2 + 11741^2 .

It is a super-2 number, since 2×1444456690² = 4172910258571512200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1444456693) 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, 1951599 + ... + 1952338.

Almost surely, 2^1444456690 is an apocalyptic number.

1444456690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1444456690 is a deficient number, since it is larger than the sum of its proper divisors (1225836902).

1444456690 is a wasteful number, since it uses less digits than its factorization.

1444456690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3903981.

The product of its (nonzero) digits is 414720, while the sum is 43.

The square root of 1444456690 is about 38006.0086039037. The cubic root of 1444456690 is about 1130.4070087343.

The spelling of 1444456690 in words is "one billion, four hundred forty-four million, four hundred fifty-six thousand, six hundred ninety".