400108840 has 32 divisors (see below), whose sum is σ = 947628000. Its totient is φ = 151619904.

The previous prime is 400108837. The next prime is 400108843. The reversal of 400108840 is 48801004.

It is an interprime number because it is at equal distance from previous prime (400108837) and next prime (400108843).

It is a super-2 number, since 2×400108840² = 320174167692291200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (400108843) 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, 262470 + ... + 263989.

It is an arithmetic number, because the mean of its divisors is an integer number (29613375).

Almost surely, 2^400108840 is an apocalyptic number.

400108840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400108840 is an abundant number, since it is smaller than the sum of its proper divisors (547519160).

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

400108840 is a wasteful number, since it uses less digits than its factorization.

400108840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526489 (or 526485 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 25.

The square root of 400108840 is about 20002.7208149292. The cubic root of 400108840 is about 736.8731219990.

Adding to 400108840 its reverse (48801004), we get a palindrome (448909844).

The spelling of 400108840 in words is "four hundred million, one hundred eight thousand, eight hundred forty".