902229840 has 120 divisors (see below), whose sum is σ = 3142278048. Its totient is φ = 240589440.

The previous prime is 902229821. The next prime is 902229841. The reversal of 902229840 is 48922209.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 902229795 and 902229804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (902229841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3766 + ... + 42645.

Almost surely, 2^902229840 is an apocalyptic number.

902229840 is a gapful number since it is divisible by the number (90) 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 902229840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1571139024).

902229840 is an abundant number, since it is smaller than the sum of its proper divisors (2240048208).

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

902229840 is a wasteful number, since it uses less digits than its factorization.

902229840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46439 (or 46421 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 902229840 is about 30037.1410090907. The cubic root of 902229840 is about 966.2860924927.

The spelling of 902229840 in words is "nine hundred two million, two hundred twenty-nine thousand, eight hundred forty".