400894001 has 4 divisors (see below), whose sum is σ = 411729012. Its totient is φ = 390058992.

The previous prime is 400893959. The next prime is 400894007. The reversal of 400894001 is 100498004.

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

It can be written as a sum of positive squares in 2 ways, for example, as 340365601 + 60528400 = 18449^2 + 7780^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400894001 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (400894007) 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, 5417450 + ... + 5417523.

It is an arithmetic number, because the mean of its divisors is an integer number (102932253).

Almost surely, 2^400894001 is an apocalyptic number.

It is an amenable number.

400894001 is a deficient number, since it is larger than the sum of its proper divisors (10835011).

400894001 is a wasteful number, since it uses less digits than its factorization.

400894001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10835010.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 400894001 is about 20022.3375508456. The cubic root of 400894001 is about 737.3548125956.

The spelling of 400894001 in words is "four hundred million, eight hundred ninety-four thousand, one".