402220134 has 16 divisors (see below), whose sum is σ = 893822640. Its totient is φ = 134073360.

The previous prime is 402220123. The next prime is 402220157. The reversal of 402220134 is 431022204.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3724207 + ... + 3724314.

It is an arithmetic number, because the mean of its divisors is an integer number (55863915).

Almost surely, 2^402220134 is an apocalyptic number.

402220134 is an abundant number, since it is smaller than the sum of its proper divisors (491602506).

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

402220134 is a wasteful number, since it uses less digits than its factorization.

402220134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7448532 (or 7448526 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 402220134 is about 20055.4265474460. The cubic root of 402220134 is about 738.1669593833.

Adding to 402220134 its reverse (431022204), we get a palindrome (833242338).

The spelling of 402220134 in words is "four hundred two million, two hundred twenty thousand, one hundred thirty-four".