23278312290 has 16 divisors (see below), whose sum is σ = 55867949568. Its totient is φ = 6207549936.

The previous prime is 23278312273. The next prime is 23278312333. The reversal of 23278312290 is 9221387232.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 387971842 + ... + 387971901.

It is an arithmetic number, because the mean of its divisors is an integer number (3491746848).

Almost surely, 2^23278312290 is an apocalyptic number.

23278312290 is an abundant number, since it is smaller than the sum of its proper divisors (32589637278).

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

23278312290 is a wasteful number, since it uses less digits than its factorization.

23278312290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 775943753.

The product of its (nonzero) digits is 72576, while the sum is 39.

The spelling of 23278312290 in words is "twenty-three billion, two hundred seventy-eight million, three hundred twelve thousand, two hundred ninety".