102323440 has 20 divisors (see below), whose sum is σ = 237902184. Its totient is φ = 40929344.

The previous prime is 102323411. The next prime is 102323447. The reversal of 102323440 is 44323201.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102323447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 639442 + ... + 639601.

Almost surely, 2^102323440 is an apocalyptic number.

102323440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102323440 is an abundant number, since it is smaller than the sum of its proper divisors (135578744).

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

102323440 is a wasteful number, since it uses less digits than its factorization.

102323440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1279056 (or 1279050 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 102323440 is about 10115.5049305509. The cubic root of 102323440 is about 467.7262138370.

Adding to 102323440 its reverse (44323201), we get a palindrome (146646641).

The spelling of 102323440 in words is "one hundred two million, three hundred twenty-three thousand, four hundred forty".