405354890 has 8 divisors (see below), whose sum is σ = 729638820. Its totient is φ = 162141952.

The previous prime is 405354889. The next prime is 405354913. The reversal of 405354890 is 98453504.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 384277609 + 21077281 = 19603^2 + 4591^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20267735 + ... + 20267754.

Almost surely, 2^405354890 is an apocalyptic number.

405354890 is a deficient number, since it is larger than the sum of its proper divisors (324283930).

405354890 is a wasteful number, since it uses less digits than its factorization.

405354890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40535496.

The product of its (nonzero) digits is 86400, while the sum is 38.

The square root of 405354890 is about 20133.4271796930. The cubic root of 405354890 is about 740.0796663682.

The spelling of 405354890 in words is "four hundred five million, three hundred fifty-four thousand, eight hundred ninety".