405213438 has 24 divisors (see below), whose sum is σ = 942742152. Its totient is φ = 115775184.

The previous prime is 405213427. The next prime is 405213463. The reversal of 405213438 is 834312504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 688845 + ... + 689432.

It is an arithmetic number, because the mean of its divisors is an integer number (39280923).

Almost surely, 2^405213438 is an apocalyptic number.

405213438 is an abundant number, since it is smaller than the sum of its proper divisors (537528714).

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

405213438 is a wasteful number, since it uses less digits than its factorization.

405213438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1378296 (or 1378289 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 405213438 is about 20129.9140087582. The cubic root of 405213438 is about 739.9935706770.

The spelling of 405213438 in words is "four hundred five million, two hundred thirteen thousand, four hundred thirty-eight".