401640124 has 12 divisors (see below), whose sum is σ = 719216344. Its totient is φ = 196149744.

The previous prime is 401640121. The next prime is 401640137. The reversal of 401640124 is 421046104.

It is a super-2 number, since 2×401640124² = 322629578413470752, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 401640095 and 401640104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401640121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1167387 + ... + 1167730.

Almost surely, 2^401640124 is an apocalyptic number.

It is an amenable number.

401640124 is a deficient number, since it is larger than the sum of its proper divisors (317576220).

401640124 is a wasteful number, since it uses less digits than its factorization.

401640124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2335164 (or 2335162 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 401640124 is about 20040.9611545954. The cubic root of 401640124 is about 737.8119712026.

Adding to 401640124 its reverse (421046104), we get a palindrome (822686228).

The spelling of 401640124 in words is "four hundred one million, six hundred forty thousand, one hundred twenty-four".