102532440 has 64 divisors (see below), whose sum is σ = 325697760. Its totient is φ = 25733120.

The previous prime is 102532433. The next prime is 102532447. The reversal of 102532440 is 44235201.

It is an interprime number because it is at equal distance from previous prime (102532433) and next prime (102532447).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102532447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23091 + ... + 27170.

Almost surely, 2^102532440 is an apocalyptic number.

102532440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102532440 is an abundant number, since it is smaller than the sum of its proper divisors (223165320).

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

102532440 is a wasteful number, since it uses less digits than its factorization.

102532440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50292 (or 50288 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 102532440 is about 10125.8303363230. The cubic root of 102532440 is about 468.0444475281.

Adding to 102532440 its reverse (44235201), we get a palindrome (146767641).

The spelling of 102532440 in words is "one hundred two million, five hundred thirty-two thousand, four hundred forty".