23278730 has 16 divisors (see below), whose sum is σ = 41991264. Its totient is φ = 9291600.

The previous prime is 23278727. The next prime is 23278753. The reversal of 23278730 is 3787232.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3005 + ... + 7455.

It is an arithmetic number, because the mean of its divisors is an integer number (2624454).

Almost surely, 2^23278730 is an apocalyptic number.

23278730 is a deficient number, since it is larger than the sum of its proper divisors (18712534).

23278730 is a wasteful number, since it uses less digits than its factorization.

23278730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4981.

The product of its (nonzero) digits is 14112, while the sum is 32.

The square root of 23278730 is about 4824.8036229467. The cubic root of 23278730 is about 285.5308869452.

The spelling of 23278730 in words is "twenty-three million, two hundred seventy-eight thousand, seven hundred thirty".