30405942 has 40 divisors (see below), whose sum is σ = 77867856. Its totient is φ = 8687088.

The previous prime is 30405937. The next prime is 30405943. The reversal of 30405942 is 24950403.

30405942 is a `hidden beast` number, since 30 + 40 + 594 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30405943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 12273 + ... + 14540.

Almost surely, 2^30405942 is an apocalyptic number.

30405942 is an abundant number, since it is smaller than the sum of its proper divisors (47461914).

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

30405942 is a wasteful number, since it uses less digits than its factorization.

30405942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26834 (or 26825 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 30405942 is about 5514.1583219926. The cubic root of 30405942 is about 312.1184831064.

The spelling of 30405942 in words is "thirty million, four hundred five thousand, nine hundred forty-two".