102449920 has 36 divisors (see below), whose sum is σ = 245402640. Its totient is φ = 40979456.

The previous prime is 102449909. The next prime is 102449933. The reversal of 102449920 is 29944201.

It is a happy number.

It is a super-2 number, since 2×102449920² = 20991972216012800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38740 + ... + 41299.

It is an arithmetic number, because the mean of its divisors is an integer number (6816740).

Almost surely, 2^102449920 is an apocalyptic number.

102449920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102449920 is an abundant number, since it is smaller than the sum of its proper divisors (142952720).

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

102449920 is an frugal number, since it uses more digits than its factorization.

102449920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80060 (or 80046 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 102449920 is about 10121.7547885730. The cubic root of 102449920 is about 467.9188502246.

It can be divided in two parts, 10244 and 9920, that added together give a square (20164 = 142²).

The spelling of 102449920 in words is "one hundred two million, four hundred forty-nine thousand, nine hundred twenty".