403221492 has 72 divisors (see below), whose sum is σ = 1053692640. Its totient is φ = 129931200.

The previous prime is 403221479. The next prime is 403221493. The reversal of 403221492 is 294122304.

It is a super-2 number, since 2×403221492² = 325175143221412128, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (403221493) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 155059 + ... + 157637.

It is an arithmetic number, because the mean of its divisors is an integer number (14634620).

Almost surely, 2^403221492 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 403221492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (526846320).

403221492 is an abundant number, since it is smaller than the sum of its proper divisors (650471148).

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

403221492 is a wasteful number, since it uses less digits than its factorization.

403221492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2733 (or 2728 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 403221492 is about 20080.3757932963. The cubic root of 403221492 is about 738.7790262329.

Adding to 403221492 its reverse (294122304), we get a palindrome (697343796).

It can be divided in two parts, 40322 and 1492, that added together give a palindrome (41814).

The spelling of 403221492 in words is "four hundred three million, two hundred twenty-one thousand, four hundred ninety-two".