102203640 has 256 divisors, whose sum is σ = 425088000. Its totient is φ = 21219840.

The previous prime is 102203639. The next prime is 102203669. The reversal of 102203640 is 46302201.

It is a happy number.

102203640 is a `hidden beast` number, since 1 + 0 + 2 + 20 + 3 + 640 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 82546 + ... + 83774.

It is an arithmetic number, because the mean of its divisors is an integer number (1660500).

Almost surely, 2^102203640 is an apocalyptic number.

102203640 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 102203640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (212544000).

102203640 is an abundant number, since it is smaller than the sum of its proper divisors (322884360).

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

102203640 is a wasteful number, since it uses less digits than its factorization.

102203640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1267 (or 1257 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 102203640 is about 10109.5815937159. The cubic root of 102203640 is about 467.5436050341.

Adding to 102203640 its reverse (46302201), we get a palindrome (148505841).

The spelling of 102203640 in words is "one hundred two million, two hundred three thousand, six hundred forty".