309403142 has 8 divisors (see below), whose sum is σ = 468610896. Its totient is φ = 153199512.

The previous prime is 309403123. The next prime is 309403147. The reversal of 309403142 is 241304903.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (309403147) 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, 750773 + ... + 751184.

It is an arithmetic number, because the mean of its divisors is an integer number (58576362).

Almost surely, 2^309403142 is an apocalyptic number.

309403142 is a deficient number, since it is larger than the sum of its proper divisors (159207754).

309403142 is a wasteful number, since it uses less digits than its factorization.

309403142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1502062.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 309403142 is about 17589.8590670875. The cubic root of 309403142 is about 676.3553140093.

The spelling of 309403142 in words is "three hundred nine million, four hundred three thousand, one hundred forty-two".