405903474 has 40 divisors (see below), whose sum is σ = 911114028. Its totient is φ = 135064800.

The previous prime is 405903473. The next prime is 405903523. The reversal of 405903474 is 474309504.

It can be written as a sum of positive squares in 2 ways, for example, as 369216225 + 36687249 = 19215^2 + 6057^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (405903473) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 107824 + ... + 111524.

Almost surely, 2^405903474 is an apocalyptic number.

405903474 is an abundant number, since it is smaller than the sum of its proper divisors (505210554).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

405903474 is a wasteful number, since it uses less digits than its factorization.

405903474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4392 (or 4383 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The square root of 405903474 is about 20147.0462847535. The cubic root of 405903474 is about 740.4133762940.

The spelling of 405903474 in words is "four hundred five million, nine hundred three thousand, four hundred seventy-four".