291000472 has 32 divisors (see below), whose sum is σ = 643691520. Its totient is φ = 120690720.

The previous prime is 291000421. The next prime is 291000473. The reversal of 291000472 is 274000192.

291000472 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (291000473) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82078 + ... + 85549.

It is an arithmetic number, because the mean of its divisors is an integer number (20115360).

Almost surely, 2^291000472 is an apocalyptic number.

It is an amenable number.

291000472 is an abundant number, since it is smaller than the sum of its proper divisors (352691048).

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

291000472 is a wasteful number, since it uses less digits than its factorization.

291000472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167671 (or 167667 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 291000472 is about 17058.7359437914. The cubic root of 291000472 is about 662.6708970298.

The spelling of 291000472 in words is "two hundred ninety-one million, four hundred seventy-two", and thus it is an aban number.