102432440 has 32 divisors (see below), whose sum is σ = 251426160. Its totient is φ = 37248000.

The previous prime is 102432433. The next prime is 102432467. The reversal of 102432440 is 44234201.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115961 + ... + 116840.

Almost surely, 2^102432440 is an apocalyptic number.

102432440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102432440 is an abundant number, since it is smaller than the sum of its proper divisors (148993720).

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

102432440 is a wasteful number, since it uses less digits than its factorization.

102432440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232823 (or 232819 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 102432440 is about 10120.8912651011. The cubic root of 102432440 is about 467.8922366144.

Adding to 102432440 its reverse (44234201), we get a palindrome (146666641).

The spelling of 102432440 in words is "one hundred two million, four hundred thirty-two thousand, four hundred forty".