102905240 has 32 divisors (see below), whose sum is σ = 233794080. Its totient is φ = 40760832.

The previous prime is 102905227. The next prime is 102905269. The reversal of 102905240 is 42509201.

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 7 ways as a sum of consecutive naturals, for example, 8369 + ... + 16608.

It is an arithmetic number, because the mean of its divisors is an integer number (7306065).

Almost surely, 2^102905240 is an apocalyptic number.

102905240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102905240 is an abundant number, since it is smaller than the sum of its proper divisors (130888840).

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

102905240 is a wasteful number, since it uses less digits than its factorization.

102905240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25091 (or 25087 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 102905240 is about 10144.2220007253. Note that the first 3 decimals coincide. The cubic root of 102905240 is about 468.6110191825.

The spelling of 102905240 in words is "one hundred two million, nine hundred five thousand, two hundred forty".