400770001 has 4 divisors (see below), whose sum is σ = 404446900. Its totient is φ = 397093104.

The previous prime is 400769969. The next prime is 400770011. The reversal of 400770001 is 100077004.

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 262472401 + 138297600 = 16201^2 + 11760^2 .

It is not a de Polignac number, because 400770001 - 2⁵ = 400769969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400770011) 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, 1838286 + ... + 1838503.

It is an arithmetic number, because the mean of its divisors is an integer number (101111725).

Almost surely, 2^400770001 is an apocalyptic number.

It is an amenable number.

400770001 is a deficient number, since it is larger than the sum of its proper divisors (3676899).

400770001 is a wasteful number, since it uses less digits than its factorization.

400770001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3676898.

The product of its (nonzero) digits is 196, while the sum is 19.

The square root of 400770001 is about 20019.2407698194. The cubic root of 400770001 is about 737.2787813379.

The spelling of 400770001 in words is "four hundred million, seven hundred seventy thousand, one".