400455155 has 8 divisors (see below), whose sum is σ = 480810384. Its totient is φ = 320188000.

The previous prime is 400455131. The next prime is 400455157. The reversal of 400455155 is 551554004.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-400455155 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400455157) 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, 11561 + ... + 30570.

It is an arithmetic number, because the mean of its divisors is an integer number (60101298).

Almost surely, 2^400455155 is an apocalyptic number.

400455155 is a deficient number, since it is larger than the sum of its proper divisors (80355229).

400455155 is a wasteful number, since it uses less digits than its factorization.

400455155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44037.

The product of its (nonzero) digits is 10000, while the sum is 29.

The square root of 400455155 is about 20011.3756398704. The cubic root of 400455155 is about 737.0856613536.

The spelling of 400455155 in words is "four hundred million, four hundred fifty-five thousand, one hundred fifty-five".