1002185940 has 96 divisors (see below), whose sum is σ = 3226890240. Its totient is φ = 227650176.

The previous prime is 1002185939. The next prime is 1002185981. The reversal of 1002185940 is 495812001.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1002185898 and 1002185907.

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, 61141 + ... + 75779.

It is an arithmetic number, because the mean of its divisors is an integer number (33613440).

Almost surely, 2^1002185940 is an apocalyptic number.

1002185940 is a gapful number since it is divisible by the number (10) 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 1002185940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1613445120).

1002185940 is an abundant number, since it is smaller than the sum of its proper divisors (2224704300).

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

1002185940 is a wasteful number, since it uses less digits than its factorization.

1002185940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14821 (or 14819 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 1002185940 is about 31657.3204804197. The cubic root of 1002185940 is about 1000.7281163845.

Adding to 1002185940 its reverse (495812001), we get a palindrome (1497997941).

The spelling of 1002185940 in words is "one billion, two million, one hundred eighty-five thousand, nine hundred forty".