102447720 has 128 divisors (see below), whose sum is σ = 353376000. Its totient is φ = 26369280.

The previous prime is 102447713. The next prime is 102447739. The reversal of 102447720 is 27744201.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 31 ways as a sum of consecutive naturals, for example, 29685 + ... + 32955.

It is an arithmetic number, because the mean of its divisors is an integer number (2760750).

Almost surely, 2^102447720 is an apocalyptic number.

102447720 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 102447720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (176688000).

102447720 is an abundant number, since it is smaller than the sum of its proper divisors (250928280).

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

102447720 is a wasteful number, since it uses less digits than its factorization.

102447720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3320 (or 3310 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 27.

The square root of 102447720 is about 10121.6461111817. The cubic root of 102447720 is about 467.9155008521.

The spelling of 102447720 in words is "one hundred two million, four hundred forty-seven thousand, seven hundred twenty".