422036640 has 72 divisors (see below), whose sum is σ = 1440204948. Its totient is φ = 112542720.

The previous prime is 422036633. The next prime is 422036647. The reversal of 422036640 is 46630224.

It is an interprime number because it is at equal distance from previous prime (422036633) and next prime (422036647).

It can be written as a sum of positive squares in 2 ways, for example, as 388720656 + 33315984 = 19716^2 + 5772^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×422036640² = 356229851004979200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (422036647) 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, 145101 + ... + 147980.

Almost surely, 2^422036640 is an apocalyptic number.

422036640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

422036640 is an abundant number, since it is smaller than the sum of its proper divisors (1018168308).

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

422036640 is a wasteful number, since it uses less digits than its factorization.

422036640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293102 (or 293091 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 422036640 is about 20543.5303684639. The cubic root of 422036640 is about 750.0957744358.

Adding to 422036640 its reverse (46630224), we get a palindrome (468666864).

The spelling of 422036640 in words is "four hundred twenty-two million, thirty-six thousand, six hundred forty".