102250640 has 80 divisors (see below), whose sum is σ = 252412416. Its totient is φ = 38438400.

The previous prime is 102250639. The next prime is 102250651. The reversal of 102250640 is 46052201.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111785 + ... + 112695.

Almost surely, 2^102250640 is an apocalyptic number.

102250640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 102250640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126206208).

102250640 is an abundant number, since it is smaller than the sum of its proper divisors (150161776).

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

102250640 is a wasteful number, since it uses less digits than its factorization.

102250640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1008 (or 1002 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 102250640 is about 10111.9058539921. The cubic root of 102250640 is about 467.6152632185.

The spelling of 102250640 in words is "one hundred two million, two hundred fifty thousand, six hundred forty".