102023640 has 96 divisors (see below), whose sum is σ = 333758880. Its totient is φ = 27027456.

The previous prime is 102023633. The next prime is 102023651. The reversal of 102023640 is 46320201.

It is a happy number.

102023640 is a `hidden beast` number, since 1 + 0 + 2 + 0 + 23 + 640 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 59272 + ... + 60968.

It is an arithmetic number, because the mean of its divisors is an integer number (3476655).

Almost surely, 2^102023640 is an apocalyptic number.

102023640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 102023640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (166879440).

102023640 is an abundant number, since it is smaller than the sum of its proper divisors (231735240).

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

102023640 is a wasteful number, since it uses less digits than its factorization.

102023640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1881 (or 1874 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 102023640 is about 10100.6752249540. The cubic root of 102023640 is about 467.2689660771.

Adding to 102023640 its reverse (46320201), we get a palindrome (148343841).

The spelling of 102023640 in words is "one hundred two million, twenty-three thousand, six hundred forty".