400140152 has 48 divisors (see below), whose sum is σ = 839031000. Its totient is φ = 178371072.

The previous prime is 400140151. The next prime is 400140161. The reversal of 400140152 is 251041004.

It is a super-2 number, since 2×400140152² = 320224282485166208, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 400140152.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400140151) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39374 + ... + 48482.

Almost surely, 2^400140152 is an apocalyptic number.

It is an amenable number.

400140152 is an abundant number, since it is smaller than the sum of its proper divisors (438890848).

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

400140152 is a wasteful number, since it uses less digits than its factorization.

400140152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9168 (or 9147 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 400140152 is about 20003.5034931384. The cubic root of 400140152 is about 736.8923437433.

Adding to 400140152 its reverse (251041004), we get a palindrome (651181156).

The spelling of 400140152 in words is "four hundred million, one hundred forty thousand, one hundred fifty-two".