290991048 has 32 divisors (see below), whose sum is σ = 750946560. Its totient is φ = 93867840.

The previous prime is 290991047. The next prime is 290991059. The reversal of 290991048 is 840199092.

It is a super-2 number, since 2×290991048² = 169351580032276608, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (290991047) 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, 194815 + ... + 196302.

It is an arithmetic number, because the mean of its divisors is an integer number (23467080).

Almost surely, 2^290991048 is an apocalyptic number.

It is an amenable number.

290991048 is an abundant number, since it is smaller than the sum of its proper divisors (459955512).

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

290991048 is a wasteful number, since it uses less digits than its factorization.

290991048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391157 (or 391153 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 290991048 is about 17058.4597194471. The cubic root of 290991048 is about 662.6637434584.

The spelling of 290991048 in words is "two hundred ninety million, nine hundred ninety-one thousand, forty-eight".