400084842 has 16 divisors (see below), whose sum is σ = 808420032. Its totient is φ = 131986560.

The previous prime is 400084837. The next prime is 400084849. The reversal of 400084842 is 248480004.

It is not an unprimeable number, because it can be changed into a prime (400084849) 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, 343134 + ... + 344297.

It is an arithmetic number, because the mean of its divisors is an integer number (50526252).

Almost surely, 2^400084842 is an apocalyptic number.

400084842 is an abundant number, since it is smaller than the sum of its proper divisors (408335190).

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

400084842 is a wasteful number, since it uses less digits than its factorization.

400084842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 687533.

The product of its (nonzero) digits is 8192, while the sum is 30.

The square root of 400084842 is about 20002.1209375406. The cubic root of 400084842 is about 736.8583894788.

It can be divided in two parts, 40008 and 4842, that added together give a triangular number (44850 = T₂₉₉).

The spelling of 400084842 in words is "four hundred million, eighty-four thousand, eight hundred forty-two".