400534140 has 24 divisors (see below), whose sum is σ = 1121495760. Its totient is φ = 106809088.

The previous prime is 400534133. The next prime is 400534157. The reversal of 400534140 is 41435004.

It is a congruent number.

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, 3337725 + ... + 3337844.

It is an arithmetic number, because the mean of its divisors is an integer number (46728990).

Almost surely, 2^400534140 is an apocalyptic number.

It is an amenable number.

400534140 is an abundant number, since it is smaller than the sum of its proper divisors (720961620).

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

400534140 is a wasteful number, since it uses less digits than its factorization.

400534140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6675581 (or 6675579 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 400534140 is about 20013.3490450749. The cubic root of 400534140 is about 737.1341186178.

Adding to 400534140 its reverse (41435004), we get a palindrome (441969144).

The spelling of 400534140 in words is "four hundred million, five hundred thirty-four thousand, one hundred forty".