102312390 has 32 divisors (see below), whose sum is σ = 245846016. Its totient is φ = 27250400.

The previous prime is 102312389. The next prime is 102312401. The reversal of 102312390 is 93213201.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33049 + ... + 36011.

It is an arithmetic number, because the mean of its divisors is an integer number (7682688).

Almost surely, 2^102312390 is an apocalyptic number.

102312390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

102312390 is an abundant number, since it is smaller than the sum of its proper divisors (143533626).

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

102312390 is a wasteful number, since it uses less digits than its factorization.

102312390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4124.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 102312390 is about 10114.9587245821. The cubic root of 102312390 is about 467.7093765065.

Adding to 102312390 its reverse (93213201), we get a palindrome (195525591).

It can be divided in two parts, 10231 and 2390, that added together give a palindrome (12621).

The spelling of 102312390 in words is "one hundred two million, three hundred twelve thousand, three hundred ninety".