290423871 has 6 divisors (see below), whose sum is σ = 419501160. Its totient is φ = 193615908.

The previous prime is 290423863. The next prime is 290423933. The reversal of 290423871 is 178324092.

It is not a de Polignac number, because 290423871 - 2³ = 290423863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (290423831) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16134651 + ... + 16134668.

It is an arithmetic number, because the mean of its divisors is an integer number (69916860).

Almost surely, 2^290423871 is an apocalyptic number.

290423871 is a deficient number, since it is larger than the sum of its proper divisors (129077289).

290423871 is a wasteful number, since it uses less digits than its factorization.

290423871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32269325 (or 32269322 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 290423871 is about 17041.8271027493. The cubic root of 290423871 is about 662.2329259788.

The spelling of 290423871 in words is "two hundred ninety million, four hundred twenty-three thousand, eight hundred seventy-one".