23278775 has 24 divisors (see below), whose sum is σ = 31862544. Its totient is φ = 16761600.

The previous prime is 23278769. The next prime is 23278777. The reversal of 23278775 is 57787232.

It is not a de Polignac number, because 23278775 - 2⁶ = 23278711 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23278777) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12452 + ... + 14198.

It is an arithmetic number, because the mean of its divisors is an integer number (1327606).

Almost surely, 2^23278775 is an apocalyptic number.

23278775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

23278775 is a deficient number, since it is larger than the sum of its proper divisors (8583769).

23278775 is a wasteful number, since it uses less digits than its factorization.

23278775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1811 (or 1806 counting only the distinct ones).

The product of its digits is 164640, while the sum is 41.

The square root of 23278775 is about 4824.8082863467. The cubic root of 23278775 is about 285.5310709312.

The spelling of 23278775 in words is "twenty-three million, two hundred seventy-eight thousand, seven hundred seventy-five".