1444155400 has 48 divisors (see below), whose sum is σ = 3392321940. Its totient is φ = 571699200.

The previous prime is 1444155371. The next prime is 1444155409. The reversal of 1444155400 is 45514441.

It can be written as a sum of positive squares in 6 ways, for example, as 202720644 + 1241434756 = 14238^2 + 35234^2 .

It is not an unprimeable number, because it can be changed into a prime (1444155409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17821 + ... + 56620.

Almost surely, 2^1444155400 is an apocalyptic number.

1444155400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1444155400 is an abundant number, since it is smaller than the sum of its proper divisors (1948166540).

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

1444155400 is a wasteful number, since it uses less digits than its factorization.

1444155400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74554 (or 74545 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 28.

The square root of 1444155400 is about 38002.0446818326. The cubic root of 1444155400 is about 1130.3284084752.

Adding to 1444155400 its reverse (45514441), we get a palindrome (1489669841).

The spelling of 1444155400 in words is "one billion, four hundred forty-four million, one hundred fifty-five thousand, four hundred".