402220144 has 10 divisors (see below), whose sum is σ = 779301560. Its totient is φ = 201110064.

The previous prime is 402220123. The next prime is 402220157. The reversal of 402220144 is 441022204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12569364 + ... + 12569395.

It is an arithmetic number, because the mean of its divisors is an integer number (77930156).

Almost surely, 2^402220144 is an apocalyptic number.

It is an amenable number.

402220144 is a deficient number, since it is larger than the sum of its proper divisors (377081416).

402220144 is a wasteful number, since it uses less digits than its factorization.

402220144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25138767 (or 25138761 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 402220144 is about 20055.4267967550. The cubic root of 402220144 is about 738.1669655008.

Adding to 402220144 its reverse (441022204), we get a palindrome (843242348).

The spelling of 402220144 in words is "four hundred two million, two hundred twenty thousand, one hundred forty-four".