102660140 has 24 divisors (see below), whose sum is σ = 235185552. Its totient is φ = 37330880.

The previous prime is 102660139. The next prime is 102660191. The reversal of 102660140 is 41066201.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 233099 + ... + 233538.

It is an arithmetic number, because the mean of its divisors is an integer number (9799398).

Almost surely, 2^102660140 is an apocalyptic number.

102660140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102660140 is an abundant number, since it is smaller than the sum of its proper divisors (132525412).

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

102660140 is a wasteful number, since it uses less digits than its factorization.

102660140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466657 (or 466655 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 102660140 is about 10132.1340299070. The cubic root of 102660140 is about 468.2386770477.

The spelling of 102660140 in words is "one hundred two million, six hundred sixty thousand, one hundred forty".