400797777 has 8 divisors (see below), whose sum is σ = 552824640. Its totient is φ = 257984720.

The previous prime is 400797773. The next prime is 400797809. The reversal of 400797777 is 777797004.

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

It is a cyclic number.

It is not a de Polignac number, because 400797777 - 2² = 400797773 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400797773) 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, 2303349 + ... + 2303522.

It is an arithmetic number, because the mean of its divisors is an integer number (69103080).

Almost surely, 2^400797777 is an apocalyptic number.

It is an amenable number.

400797777 is a deficient number, since it is larger than the sum of its proper divisors (152026863).

400797777 is a wasteful number, since it uses less digits than its factorization.

400797777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4606903.

The product of its (nonzero) digits is 605052, while the sum is 48.

The square root of 400797777 is about 20019.9344904023. The cubic root of 400797777 is about 737.2958137025.

The spelling of 400797777 in words is "four hundred million, seven hundred ninety-seven thousand, seven hundred seventy-seven".