405632155 has 8 divisors (see below), whose sum is σ = 515391552. Its totient is φ = 305417088.

The previous prime is 405632131. The next prime is 405632167. The reversal of 405632155 is 551236504.

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 405632155 - 2⁷ = 405632027 is a prime.

It is a Duffinian 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, 2385987 + ... + 2386156.

It is an arithmetic number, because the mean of its divisors is an integer number (64423944).

Almost surely, 2^405632155 is an apocalyptic number.

405632155 is a deficient number, since it is larger than the sum of its proper divisors (109759397).

405632155 is a wasteful number, since it uses less digits than its factorization.

405632155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4772165.

The product of its (nonzero) digits is 18000, while the sum is 31.

The square root of 405632155 is about 20140.3116907361. The cubic root of 405632155 is about 740.2483674464.

Adding to 405632155 its reverse (551236504), we get a palindrome (956868659).

The spelling of 405632155 in words is "four hundred five million, six hundred thirty-two thousand, one hundred fifty-five".