400025140 has 48 divisors (see below), whose sum is σ = 853719552. Its totient is φ = 157424256.

The previous prime is 400025099. The next prime is 400025149. The reversal of 400025140 is 41520004.

400025140 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×400025140² = 320040225264039200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400025149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 658717 + ... + 659323.

It is an arithmetic number, because the mean of its divisors is an integer number (17785824).

Almost surely, 2^400025140 is an apocalyptic number.

It is an amenable number.

400025140 is an abundant number, since it is smaller than the sum of its proper divisors (453694412).

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

400025140 is a wasteful number, since it uses less digits than its factorization.

400025140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1096 (or 1094 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 400025140 is about 20000.6284901250. The cubic root of 400025140 is about 736.8217354967.

Adding to 400025140 its reverse (41520004), we get a palindrome (441545144).

The spelling of 400025140 in words is "four hundred million, twenty-five thousand, one hundred forty".