402030440 has 64 divisors (see below), whose sum is σ = 1053336960. Its totient is φ = 135233280.

The previous prime is 402030439. The next prime is 402030449. The reversal of 402030440 is 44030204.

It is not an unprimeable number, because it can be changed into a prime (402030449) 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, 1295 + ... + 28385.

It is an arithmetic number, because the mean of its divisors is an integer number (16458390).

Almost surely, 2^402030440 is an apocalyptic number.

402030440 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 402030440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (526668480).

402030440 is an abundant number, since it is smaller than the sum of its proper divisors (651306520).

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

402030440 is a wasteful number, since it uses less digits than its factorization.

402030440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27162 (or 27158 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 402030440 is about 20050.6967459986. The cubic root of 402030440 is about 738.0508970168.

Adding to 402030440 its reverse (44030204), we get a palindrome (446060644).

The spelling of 402030440 in words is "four hundred two million, thirty thousand, four hundred forty".