400772105 has 4 divisors (see below), whose sum is σ = 480926532. Its totient is φ = 320617680.

The previous prime is 400772101. The next prime is 400772159. The reversal of 400772105 is 501277004.

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 41783296 + 358988809 = 6464^2 + 18947^2 .

It is not a de Polignac number, because 400772105 - 2² = 400772101 is a prime.

It is a super-2 number, since 2×400772105² = 321236560292262050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400772101) 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, 40077206 + ... + 40077215.

It is an arithmetic number, because the mean of its divisors is an integer number (120231633).

Almost surely, 2^400772105 is an apocalyptic number.

It is an amenable number.

400772105 is a deficient number, since it is larger than the sum of its proper divisors (80154427).

400772105 is an equidigital number, since it uses as much as digits as its factorization.

400772105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80154426.

The product of its (nonzero) digits is 1960, while the sum is 26.

The square root of 400772105 is about 20019.2933191959. The cubic root of 400772105 is about 737.2800715474.

The spelling of 400772105 in words is "four hundred million, seven hundred seventy-two thousand, one hundred five".