400536340 has 24 divisors (see below), whose sum is σ = 885396960. Its totient is φ = 151782048.

The previous prime is 400536319. The next prime is 400536341. The reversal of 400536340 is 43635004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400536341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 526642 + ... + 527401.

It is an arithmetic number, because the mean of its divisors is an integer number (36891540).

Almost surely, 2^400536340 is an apocalyptic number.

It is an amenable number.

400536340 is an abundant number, since it is smaller than the sum of its proper divisors (484860620).

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

400536340 is a wasteful number, since it uses less digits than its factorization.

400536340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1054071 (or 1054069 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 400536340 is about 20013.4040083140. The cubic root of 400536340 is about 737.1354682257.

The spelling of 400536340 in words is "four hundred million, five hundred thirty-six thousand, three hundred forty".