102180940 has 12 divisors (see below), whose sum is σ = 214580016. Its totient is φ = 40872368.

The previous prime is 102180937. The next prime is 102180941. The reversal of 102180940 is 49081201.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (102180941) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2554504 + ... + 2554543.

It is an arithmetic number, because the mean of its divisors is an integer number (17881668).

Almost surely, 2^102180940 is an apocalyptic number.

102180940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102180940 is an abundant number, since it is smaller than the sum of its proper divisors (112399076).

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

102180940 is a wasteful number, since it uses less digits than its factorization.

102180940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5109056 (or 5109054 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 102180940 is about 10108.4588340657. The cubic root of 102180940 is about 467.5089877880.

The spelling of 102180940 in words is "one hundred two million, one hundred eighty thousand, nine hundred forty".