402203440 has 80 divisors (see below), whose sum is σ = 978687360. Its totient is φ = 153559040.

The previous prime is 402203437. The next prime is 402203447. The reversal of 402203440 is 44302204.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (402203447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 152856 + ... + 155464.

It is an arithmetic number, because the mean of its divisors is an integer number (12233592).

Almost surely, 2^402203440 is an apocalyptic number.

402203440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402203440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (489343680).

402203440 is an abundant number, since it is smaller than the sum of its proper divisors (576483920).

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

402203440 is a wasteful number, since it uses less digits than its factorization.

402203440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2710 (or 2704 counting only the distinct ones).

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

The square root of 402203440 is about 20055.0103465443. The cubic root of 402203440 is about 738.1567467919.

Adding to 402203440 its reverse (44302204), we get a palindrome (446505644).

It can be divided in two parts, 40220 and 3440, that added together give a triangular number (43660 = T₂₉₅).

The spelling of 402203440 in words is "four hundred two million, two hundred three thousand, four hundred forty".