402143340 has 48 divisors (see below), whose sum is σ = 1127171808. Its totient is φ = 107126784.

The previous prime is 402143323. The next prime is 402143359. The reversal of 402143340 is 43341204.

402143340 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66274 + ... + 72086.

It is an arithmetic number, because the mean of its divisors is an integer number (23482746).

Almost surely, 2^402143340 is an apocalyptic number.

It is an amenable number.

402143340 is an abundant number, since it is smaller than the sum of its proper divisors (725028468).

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

402143340 is a wasteful number, since it uses less digits than its factorization.

402143340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6978 (or 6976 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 402143340 is about 20053.5119118822. The cubic root of 402143340 is about 738.1199781437.

Adding to 402143340 its reverse (43341204), we get a palindrome (445484544).

The spelling of 402143340 in words is "four hundred two million, one hundred forty-three thousand, three hundred forty".