405746426 has 4 divisors (see below), whose sum is σ = 608619642. Its totient is φ = 202873212.

The previous prime is 405746399. The next prime is 405746437. The reversal of 405746426 is 624647504.

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

It can be written as a sum of positive squares in only one way, i.e., 246961225 + 158785201 = 15715^2 + 12601^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 405746426.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101436605 + ... + 101436608.

Almost surely, 2^405746426 is an apocalyptic number.

405746426 is a deficient number, since it is larger than the sum of its proper divisors (202873216).

405746426 is a wasteful number, since it uses less digits than its factorization.

405746426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202873215.

The product of its (nonzero) digits is 161280, while the sum is 38.

The square root of 405746426 is about 20143.1483636496. The cubic root of 405746426 is about 740.3178729316.

The spelling of 405746426 in words is "four hundred five million, seven hundred forty-six thousand, four hundred twenty-six".