402213042 has 96 divisors (see below), whose sum is σ = 1090537344. Its totient is φ = 104083200.

The previous prime is 402213037. The next prime is 402213059. The reversal of 402213042 is 240312204.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 721828 + ... + 722384.

It is an arithmetic number, because the mean of its divisors is an integer number (11359764).

Almost surely, 2^402213042 is an apocalyptic number.

402213042 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 402213042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (545268672).

402213042 is an abundant number, since it is smaller than the sum of its proper divisors (688324302).

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

402213042 is a wasteful number, since it uses less digits than its factorization.

402213042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1104 (or 1101 counting only the distinct ones).

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

The square root of 402213042 is about 20055.2497366650. The cubic root of 402213042 is about 738.1626208712.

Adding to 402213042 its reverse (240312204), we get a palindrome (642525246).

It can be divided in two parts, 402 and 213042, that added together give a square (213444 = 462²).

The spelling of 402213042 in words is "four hundred two million, two hundred thirteen thousand, forty-two".