1005405402 has 16 divisors (see below), whose sum is σ = 2013252192. Its totient is φ = 334728240.

The previous prime is 1005405391. The next prime is 1005405407. The reversal of 1005405402 is 2045045001.

It is not an unprimeable number, because it can be changed into a prime (1005405407) 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, 96349 + ... + 106272.

It is an arithmetic number, because the mean of its divisors is an integer number (125828262).

Almost surely, 2^1005405402 is an apocalyptic number.

1005405402 is an abundant number, since it is smaller than the sum of its proper divisors (1007846790).

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

1005405402 is a wasteful number, since it uses less digits than its factorization.

1005405402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203453.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 1005405402 is about 31708.1283269763. The cubic root of 1005405402 is about 1001.7985638952.

The spelling of 1005405402 in words is "one billion, five million, four hundred five thousand, four hundred two".