102440020140 has 96 divisors (see below), whose sum is σ = 319914524160. Its totient is φ = 27213432768.

The previous prime is 102440020139. The next prime is 102440020147. The reversal of 102440020140 is 41020044201.

102440020140 is a `hidden beast` number, since 1 + 0 + 24 + 400 + 201 + 40 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (102440020147) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 218634 + ... + 502673.

It is an arithmetic number, because the mean of its divisors is an integer number (3332442960).

Almost surely, 2^102440020140 is an apocalyptic number.

102440020140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102440020140 is an abundant number, since it is smaller than the sum of its proper divisors (217474504020).

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

102440020140 is a wasteful number, since it uses less digits than its factorization.

102440020140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721588 (or 721580 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 102440020140 its reverse (41020044201), we get a palindrome (143460064341).

The spelling of 102440020140 in words is "one hundred two billion, four hundred forty million, twenty thousand, one hundred forty".