102239420 has 48 divisors (see below), whose sum is σ = 219300480. Its totient is φ = 40029696.

The previous prime is 102239407. The next prime is 102239441. The reversal of 102239420 is 24932201.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 348794 + ... + 349086.

It is an arithmetic number, because the mean of its divisors is an integer number (4568760).

Almost surely, 2^102239420 is an apocalyptic number.

102239420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102239420 is an abundant number, since it is smaller than the sum of its proper divisors (117061060).

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

102239420 is a wasteful number, since it uses less digits than its factorization.

102239420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614 (or 612 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 102239420 is about 10111.3510472142. The cubic root of 102239420 is about 467.5981587284.

The spelling of 102239420 in words is "one hundred two million, two hundred thirty-nine thousand, four hundred twenty".