305172942 has 8 divisors (see below), whose sum is σ = 610345896. Its totient is φ = 101724312.

The previous prime is 305172919. The next prime is 305172943. The reversal of 305172942 is 249271503.

It is a sphenic number, since it is the product of 3 distinct primes.

305172942 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (305172943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25431073 + ... + 25431084.

It is an arithmetic number, because the mean of its divisors is an integer number (76293237).

Almost surely, 2^305172942 is an apocalyptic number.

305172942 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

305172942 is a wasteful number, since it uses less digits than its factorization.

305172942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50862162.

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 305172942 is about 17469.1998099512. The cubic root of 305172942 is about 673.2587526998.

The spelling of 305172942 in words is "three hundred five million, one hundred seventy-two thousand, nine hundred forty-two".