400552505 has 8 divisors (see below), whose sum is σ = 480971400. Its totient is φ = 320236416.

The previous prime is 400552489. The next prime is 400552511. The reversal of 400552505 is 505255004.

It can be written as a sum of positive squares in 4 ways, for example, as 85525504 + 315027001 = 9248^2 + 17749^2 .

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 400552505 - 2⁴ = 400552489 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16850 + ... + 32939.

It is an arithmetic number, because the mean of its divisors is an integer number (60121425).

Almost surely, 2^400552505 is an apocalyptic number.

It is an amenable number.

400552505 is a deficient number, since it is larger than the sum of its proper divisors (80418895).

400552505 is a wasteful number, since it uses less digits than its factorization.

400552505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51403.

The product of its (nonzero) digits is 5000, while the sum is 26.

The square root of 400552505 is about 20013.8078585760. The cubic root of 400552505 is about 737.1453846247.

The spelling of 400552505 in words is "four hundred million, five hundred fifty-two thousand, five hundred five".