291449016 has 40 divisors (see below), whose sum is σ = 816328920. Its totient is φ = 97149456.

The previous prime is 291449009. The next prime is 291449017. The reversal of 291449016 is 610944192.

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 not an unprimeable number, because it can be changed into a prime (291449017) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 224236 + ... + 225531.

It is an arithmetic number, because the mean of its divisors is an integer number (20408223).

Almost surely, 2^291449016 is an apocalyptic number.

It is an amenable number.

291449016 is an abundant number, since it is smaller than the sum of its proper divisors (524879904).

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

291449016 is a wasteful number, since it uses less digits than its factorization.

291449016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449785 (or 449772 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 291449016 is about 17071.8779283358. The cubic root of 291449016 is about 663.0111994177.

The spelling of 291449016 in words is "two hundred ninety-one million, four hundred forty-nine thousand, sixteen".