402821372 has 18 divisors (see below), whose sum is σ = 708776208. Its totient is φ = 200319768.

The previous prime is 402821371. The next prime is 402821389. The reversal of 402821372 is 273128204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402821371) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 157133 + ... + 159675.

It is an arithmetic number, because the mean of its divisors is an integer number (39376456).

Almost surely, 2^402821372 is an apocalyptic number.

It is an amenable number.

402821372 is a deficient number, since it is larger than the sum of its proper divisors (305954836).

402821372 is a wasteful number, since it uses less digits than its factorization.

402821372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2945 (or 2744 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 402821372 is about 20070.4103595318. The cubic root of 402821372 is about 738.5345798601.

Adding to 402821372 its reverse (273128204), we get a palindrome (675949576).

The spelling of 402821372 in words is "four hundred two million, eight hundred twenty-one thousand, three hundred seventy-two".