400000053 has 8 divisors (see below), whose sum is σ = 534487168. Its totient is φ = 266089824.

The previous prime is 400000049. The next prime is 400000067. The reversal of 400000053 is 350000004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 400000053 - 2² = 400000049 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 399999984 and 400000038.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400000043) 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, 142600 + ... + 145377.

It is an arithmetic number, because the mean of its divisors is an integer number (66810896).

Almost surely, 2^400000053 is an apocalyptic number.

It is an amenable number.

400000053 is a deficient number, since it is larger than the sum of its proper divisors (134487115).

400000053 is a wasteful number, since it uses less digits than its factorization.

400000053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288443.

The product of its (nonzero) digits is 60, while the sum is 12.

The square root of 400000053 is about 20000.0013250000. The cubic root of 400000053 is about 736.8063322704.

Subtracting from 400000053 its product of nonzero digits (60), we obtain a palindrome (399999993).

Adding to 400000053 its reverse (350000004), we get a palindrome (750000057).

The spelling of 400000053 in words is "four hundred million, fifty-three", and thus it is an aban number.