303138972 has 72 divisors (see below), whose sum is σ = 796199040. Its totient is φ = 97130880.

The previous prime is 303138961. The next prime is 303138989. The reversal of 303138972 is 279831303.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 305397 + ... + 306387.

It is an arithmetic number, because the mean of its divisors is an integer number (11058320).

Almost surely, 2^303138972 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 303138972, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (398099520).

303138972 is an abundant number, since it is smaller than the sum of its proper divisors (493060068).

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

303138972 is a wasteful number, since it uses less digits than its factorization.

303138972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1323 (or 1318 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 303138972 is about 17410.8865943122. The cubic root of 303138972 is about 671.7596663959.

The spelling of 303138972 in words is "three hundred three million, one hundred thirty-eight thousand, nine hundred seventy-two".