402232240 has 40 divisors (see below), whose sum is σ = 990204480. Its totient is φ = 151428096.

The previous prime is 402232219. The next prime is 402232247. The reversal of 402232240 is 42232204.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (402232247) by changing a digit.

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, 146520 + ... + 149239.

It is an arithmetic number, because the mean of its divisors is an integer number (24755112).

Almost surely, 2^402232240 is an apocalyptic number.

402232240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402232240 is an abundant number, since it is smaller than the sum of its proper divisors (587972240).

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

402232240 is a wasteful number, since it uses less digits than its factorization.

402232240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295789 (or 295783 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 402232240 is about 20055.7283587508. The cubic root of 402232240 is about 738.1743650789.

Adding to 402232240 its reverse (42232204), we get a palindrome (444464444).

The spelling of 402232240 in words is "four hundred two million, two hundred thirty-two thousand, two hundred forty".