402330440 has 64 divisors (see below), whose sum is σ = 927504000. Its totient is φ = 157017600.

The previous prime is 402330433. The next prime is 402330443. The reversal of 402330440 is 44033204.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (402330443) 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, 355796 + ... + 356924.

It is an arithmetic number, because the mean of its divisors is an integer number (14492250).

Almost surely, 2^402330440 is an apocalyptic number.

402330440 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 402330440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (463752000).

402330440 is an abundant number, since it is smaller than the sum of its proper divisors (525173560).

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

402330440 is a wasteful number, since it uses less digits than its factorization.

402330440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1350 (or 1346 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 402330440 is about 20058.1763876979. The cubic root of 402330440 is about 738.2344322218.

Adding to 402330440 its reverse (44033204), we get a palindrome (446363644).

The spelling of 402330440 in words is "four hundred two million, three hundred thirty thousand, four hundred forty".