402244240 has 40 divisors (see below), whose sum is σ = 975883968. Its totient is φ = 153901440.

The previous prime is 402244169. The next prime is 402244243. The reversal of 402244240 is 42442204.

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

It is a super-2 number, since 2×402244240² = 323600857226355200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (402244243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107466 + ... + 111145.

Almost surely, 2^402244240 is an apocalyptic number.

402244240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402244240 is an abundant number, since it is smaller than the sum of its proper divisors (573639728).

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

402244240 is a wasteful number, since it uses less digits than its factorization.

402244240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218647 (or 218641 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 22.

The square root of 402244240 is about 20056.0275229169. The cubic root of 402244240 is about 738.1817057836.

Adding to 402244240 its reverse (42442204), we get a palindrome (444686444).

The spelling of 402244240 in words is "four hundred two million, two hundred forty-four thousand, two hundred forty".