102409740 has 72 divisors (see below), whose sum is σ = 320681088. Its totient is φ = 26426880.

The previous prime is 102409733. The next prime is 102409793. The reversal of 102409740 is 47904201.

It is a happy 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, 3597 + ... + 14756.

It is an arithmetic number, because the mean of its divisors is an integer number (4453904).

Almost surely, 2^102409740 is an apocalyptic number.

102409740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102409740 is an abundant number, since it is smaller than the sum of its proper divisors (218271348).

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

102409740 is a wasteful number, since it uses less digits than its factorization.

102409740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18399 (or 18394 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 102409740 is about 10119.7697602268. The cubic root of 102409740 is about 467.8576709421.

The spelling of 102409740 in words is "one hundred two million, four hundred nine thousand, seven hundred forty".