400840092 has 36 divisors (see below), whose sum is σ = 1040622856. Its totient is φ = 130001760.

The previous prime is 400840079. The next prime is 400840103. The reversal of 400840092 is 290048004.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 149134 + ... + 151797.

Almost surely, 2^400840092 is an apocalyptic number.

It is an amenable number.

400840092 is an abundant number, since it is smaller than the sum of its proper divisors (639782764).

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

400840092 is a wasteful number, since it uses less digits than its factorization.

400840092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300978 (or 300973 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 400840092 is about 20020.9912841497. The cubic root of 400840092 is about 737.3217599330.

Adding to 400840092 its reverse (290048004), we get a palindrome (690888096).

It can be divided in two parts, 4008 and 40092, that added together give a square (44100 = 210²).

The spelling of 400840092 in words is "four hundred million, eight hundred forty thousand, ninety-two".