400505215 has 8 divisors (see below), whose sum is σ = 524297808. Its totient is φ = 291276480.

The previous prime is 400505201. The next prime is 400505221. The reversal of 400505215 is 512505004.

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

It is not a de Polignac number, because 400505215 - 2¹³ = 400497023 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 3640902 + ... + 3641011.

It is an arithmetic number, because the mean of its divisors is an integer number (65537226).

Almost surely, 2^400505215 is an apocalyptic number.

400505215 is a deficient number, since it is larger than the sum of its proper divisors (123792593).

400505215 is a wasteful number, since it uses less digits than its factorization.

400505215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7281929.

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 400505215 is about 20012.6263893573. The cubic root of 400505215 is about 737.1163738819.

The spelling of 400505215 in words is "four hundred million, five hundred five thousand, two hundred fifteen".