402146540 has 24 divisors (see below), whose sum is σ = 846432720. Its totient is φ = 160491968.

The previous prime is 402146531. The next prime is 402146579. The reversal of 402146540 is 45641204.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13835 + ... + 31554.

It is an arithmetic number, because the mean of its divisors is an integer number (35268030).

Almost surely, 2^402146540 is an apocalyptic number.

It is an amenable number.

402146540 is an abundant number, since it is smaller than the sum of its proper divisors (444286180).

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

402146540 is a wasteful number, since it uses less digits than its factorization.

402146540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45841 (or 45839 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 402146540 is about 20053.5916982470. The cubic root of 402146540 is about 738.1219359677.

Adding to 402146540 its reverse (45641204), we get a palindrome (447787744).

The spelling of 402146540 in words is "four hundred two million, one hundred forty-six thousand, five hundred forty".