102687240 has 32 divisors (see below), whose sum is σ = 308062080. Its totient is φ = 27383232.

The previous prime is 102687239. The next prime is 102687251. The reversal of 102687240 is 42786201.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 102687198 and 102687207.

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, 427744 + ... + 427983.

It is an arithmetic number, because the mean of its divisors is an integer number (9626940).

Almost surely, 2^102687240 is an apocalyptic number.

102687240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102687240 is an abundant number, since it is smaller than the sum of its proper divisors (205374840).

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

102687240 is a wasteful number, since it uses less digits than its factorization.

102687240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 855741 (or 855737 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 102687240 is about 10133.4712709910. The cubic root of 102687240 is about 468.2798749646.

The spelling of 102687240 in words is "one hundred two million, six hundred eighty-seven thousand, two hundred forty".