42905406 has 24 divisors (see below), whose sum is σ = 86792472. Its totient is φ = 14140000.

The previous prime is 42905389. The next prime is 42905411. The reversal of 42905406 is 60450924.

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, 60856 + ... + 61556.

It is an arithmetic number, because the mean of its divisors is an integer number (3616353).

Almost surely, 2^42905406 is an apocalyptic number.

42905406 is an abundant number, since it is smaller than the sum of its proper divisors (43887066).

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

42905406 is a wasteful number, since it uses less digits than its factorization.

42905406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 908 (or 807 counting only the distinct ones).

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

The square root of 42905406 is about 6550.2218283047. The cubic root of 42905406 is about 350.0827178642.

The spelling of 42905406 in words is "forty-two million, nine hundred five thousand, four hundred six".