102312240 has 40 divisors (see below), whose sum is σ = 317168688. Its totient is φ = 27283200.

The previous prime is 102312227. The next prime is 102312247. The reversal of 102312240 is 42213201.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (102312247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212911 + ... + 213390.

Almost surely, 2^102312240 is an apocalyptic number.

102312240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102312240 is an abundant number, since it is smaller than the sum of its proper divisors (214856448).

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

102312240 is a wasteful number, since it uses less digits than its factorization.

102312240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426317 (or 426311 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 102312240 is about 10114.9513098185. The cubic root of 102312240 is about 467.7091479371.

Adding to 102312240 its reverse (42213201), we get a palindrome (144525441).

The spelling of 102312240 in words is "one hundred two million, three hundred twelve thousand, two hundred forty".