402022240 has 24 divisors (see below), whose sum is σ = 949777920. Its totient is φ = 160808832.

The previous prime is 402022237. The next prime is 402022241. The reversal of 402022240 is 42220204.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402022241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1256160 + ... + 1256479.

It is an arithmetic number, because the mean of its divisors is an integer number (39574080).

Almost surely, 2^402022240 is an apocalyptic number.

402022240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402022240 is an abundant number, since it is smaller than the sum of its proper divisors (547755680).

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

402022240 is a wasteful number, since it uses less digits than its factorization.

402022240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2512654 (or 2512646 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 402022240 is about 20050.4922632837. The cubic root of 402022240 is about 738.0458791062.

Adding to 402022240 its reverse (42220204), we get a palindrome (444242444).

The spelling of 402022240 in words is "four hundred two million, twenty-two thousand, two hundred forty".