42222402 has 24 divisors (see below), whose sum is σ = 93955836. Its totient is φ = 13693536.

The previous prime is 42222391. The next prime is 42222409. The reversal of 42222402 is 20422224.

42222402 is a `hidden beast` number, since 42 + 222 + 402 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 41100921 + 1121481 = 6411^2 + 1059^2 .

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

It is not an unprimeable number, because it can be changed into a prime (42222409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31033 + ... + 32364.

Almost surely, 2^42222402 is an apocalyptic number.

42222402 is an abundant number, since it is smaller than the sum of its proper divisors (51733434).

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

42222402 is a wasteful number, since it uses less digits than its factorization.

42222402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63442 (or 63439 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 42222402 is about 6497.8767301327. The cubic root of 42222402 is about 348.2151364938.

Adding to 42222402 its reverse (20422224), we get a palindrome (62644626).

It can be divided in two parts, 42222 and 402, that added together give a palindrome (42624).

The spelling of 42222402 in words is "forty-two million, two hundred twenty-two thousand, four hundred two".