402221152 has 48 divisors (see below), whose sum is σ = 814819824. Its totient is φ = 195328000.

The previous prime is 402221147. The next prime is 402221161. The reversal of 402221152 is 251122204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 368127 + ... + 369217.

It is an arithmetic number, because the mean of its divisors is an integer number (16975413).

Almost surely, 2^402221152 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402221152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (407409912).

402221152 is an abundant number, since it is smaller than the sum of its proper divisors (412598672).

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

402221152 is a wasteful number, since it uses less digits than its factorization.

402221152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1423 (or 1415 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 402221152 is about 20055.4519270945. The cubic root of 402221152 is about 738.1675821379.

Adding to 402221152 its reverse (251122204), we get a palindrome (653343356).

The spelling of 402221152 in words is "four hundred two million, two hundred twenty-one thousand, one hundred fifty-two".