400841284 has 24 divisors (see below), whose sum is σ = 730533888. Its totient is φ = 192232320.

The previous prime is 400841281. The next prime is 400841291. The reversal of 400841284 is 482148004.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (400841281) 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, 292 + ... + 28315.

It is an arithmetic number, because the mean of its divisors is an integer number (30438912).

Almost surely, 2^400841284 is an apocalyptic number.

It is an amenable number.

400841284 is a deficient number, since it is larger than the sum of its proper divisors (329692604).

400841284 is a wasteful number, since it uses less digits than its factorization.

400841284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28755 (or 28753 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 31.

The square root of 400841284 is about 20021.0210528834. The cubic root of 400841284 is about 737.3224908035.

Adding to 400841284 its reverse (482148004), we get a palindrome (882989288).

The spelling of 400841284 in words is "four hundred million, eight hundred forty-one thousand, two hundred eighty-four".