1002444399 has 24 divisors (see below), whose sum is σ = 1580748624. Its totient is φ = 607104000.

The previous prime is 1002444353. The next prime is 1002444407. The reversal of 1002444399 is 9934442001.

1002444399 is a `hidden beast` number, since 100 + 24 + 443 + 99 = 666.

It is not a de Polignac number, because 1002444399 - 2⁷ = 1002444271 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002444319) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 181519 + ... + 186959.

It is an arithmetic number, because the mean of its divisors is an integer number (65864526).

Almost surely, 2^1002444399 is an apocalyptic number.

1002444399 is a deficient number, since it is larger than the sum of its proper divisors (578304225).

1002444399 is a wasteful number, since it uses less digits than its factorization.

1002444399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7319 (or 7316 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 1002444399 is about 31661.4023536545. The cubic root of 1002444399 is about 1000.8141366683.

The spelling of 1002444399 in words is "one billion, two million, four hundred forty-four thousand, three hundred ninety-nine".