400205427 has 4 divisors (see below), whose sum is σ = 533607240. Its totient is φ = 266803616.

The previous prime is 400205401. The next prime is 400205441. The reversal of 400205427 is 724502004.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 400205427 - 2⁶ = 400205363 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 400205397 and 400205406.

It is not an unprimeable number, because it can be changed into a prime (400205027) 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, 66700902 + ... + 66700907.

It is an arithmetic number, because the mean of its divisors is an integer number (133401810).

Almost surely, 2^400205427 is an apocalyptic number.

400205427 is a deficient number, since it is larger than the sum of its proper divisors (133401813).

400205427 is a wasteful number, since it uses less digits than its factorization.

400205427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133401812.

The product of its (nonzero) digits is 2240, while the sum is 24.

The square root of 400205427 is about 20005.1350157903. The cubic root of 400205427 is about 736.9324113980.

The spelling of 400205427 in words is "four hundred million, two hundred five thousand, four hundred twenty-seven".