405140534 has 16 divisors (see below), whose sum is σ = 640376880. Its totient is φ = 191704320.

The previous prime is 405140479. The next prime is 405140537. The reversal of 405140534 is 435041504.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405140537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34094 + ... + 44414.

It is an arithmetic number, because the mean of its divisors is an integer number (40023555).

Almost surely, 2^405140534 is an apocalyptic number.

405140534 is a deficient number, since it is larger than the sum of its proper divisors (235236346).

405140534 is a wasteful number, since it uses less digits than its factorization.

405140534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11375.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 405140534 is about 20128.1030899586. The cubic root of 405140534 is about 739.9491893528.

The spelling of 405140534 in words is "four hundred five million, one hundred forty thousand, five hundred thirty-four".