1002398544 has 160 divisors (see below), whose sum is σ = 3305978880. Its totient is φ = 284860800.

The previous prime is 1002398521. The next prime is 1002398587. The reversal of 1002398544 is 4458932001.

1002398544 is a `hidden beast` number, since 1 + 0 + 0 + 23 + 98 + 544 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 1002398499 and 1002398508.

It is a congruent 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, 637279 + ... + 638849.

It is an arithmetic number, because the mean of its divisors is an integer number (20662368).

Almost surely, 2^1002398544 is an apocalyptic number.

1002398544 is a gapful number since it is divisible by the number (14) 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 1002398544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1652989440).

1002398544 is an abundant number, since it is smaller than the sum of its proper divisors (2303580336).

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

1002398544 is a wasteful number, since it uses less digits than its factorization.

1002398544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1806 (or 1794 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 1002398544 is about 31660.6781986741. The cubic root of 1002398544 is about 1000.7988762934.

The spelling of 1002398544 in words is "one billion, two million, three hundred ninety-eight thousand, five hundred forty-four".