405450019 has 4 divisors (see below), whose sum is σ = 436638496. Its totient is φ = 374261544.

The previous prime is 405450007. The next prime is 405450037. The reversal of 405450019 is 910054504.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 405450019 - 2¹¹ = 405447971 is a prime.

It is a super-2 number, since 2×405450019² = 328779435814200722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (405450079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15594219 + ... + 15594244.

It is an arithmetic number, because the mean of its divisors is an integer number (109159624).

Almost surely, 2^405450019 is an apocalyptic number.

405450019 is a deficient number, since it is larger than the sum of its proper divisors (31188477).

405450019 is a wasteful number, since it uses less digits than its factorization.

405450019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31188476.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 405450019 is about 20135.7895052566. The cubic root of 405450019 is about 740.1375559967.

The spelling of 405450019 in words is "four hundred five million, four hundred fifty thousand, nineteen".