102280440 has 64 divisors (see below), whose sum is σ = 307994400. Its totient is φ = 27172352.

The previous prime is 102280433. The next prime is 102280441. The reversal of 102280440 is 44082201.

It is a super-2 number, since 2×102280440² = 20922576813187200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102280441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33706 + ... + 36614.

Almost surely, 2^102280440 is an apocalyptic number.

102280440 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 102280440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153997200).

102280440 is an abundant number, since it is smaller than the sum of its proper divisors (205713960).

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

102280440 is a wasteful number, since it uses less digits than its factorization.

102280440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3216 (or 3212 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 102280440 is about 10113.3792572018. The cubic root of 102280440 is about 467.6606861822.

The spelling of 102280440 in words is "one hundred two million, two hundred eighty thousand, four hundred forty".