405661134 has 64 divisors (see below), whose sum is σ = 880992000. Its totient is φ = 124104960.

The previous prime is 405661121. The next prime is 405661141. The reversal of 405661134 is 431166504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1070157 + ... + 1070535.

It is an arithmetic number, because the mean of its divisors is an integer number (13765500).

Almost surely, 2^405661134 is an apocalyptic number.

405661134 is an abundant number, since it is smaller than the sum of its proper divisors (475330866).

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

405661134 is a wasteful number, since it uses less digits than its factorization.

405661134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 405661134 is about 20141.0311056808. The cubic root of 405661134 is about 740.2659951963.

The spelling of 405661134 in words is "four hundred five million, six hundred sixty-one thousand, one hundred thirty-four".