401630140 has 24 divisors (see below), whose sum is σ = 880094880. Its totient is φ = 153667008.

The previous prime is 401630129. The next prime is 401630143. The reversal of 401630140 is 41036104.

It is a happy number.

It is a super-2 number, since 2×401630140² = 322613538712839200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401630143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 436095 + ... + 437014.

It is an arithmetic number, because the mean of its divisors is an integer number (36670620).

Almost surely, 2^401630140 is an apocalyptic number.

It is an amenable number.

401630140 is an abundant number, since it is smaller than the sum of its proper divisors (478464740).

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

401630140 is a wasteful number, since it uses less digits than its factorization.

401630140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 873141 (or 873139 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 401630140 is about 20040.7120631978. The cubic root of 401630140 is about 737.8058576237.

Adding to 401630140 its reverse (41036104), we get a palindrome (442666244).

The spelling of 401630140 in words is "four hundred one million, six hundred thirty thousand, one hundred forty".