23277780 has 60 divisors (see below), whose sum is σ = 73028340. Its totient is φ = 6206976.

The previous prime is 23277767. The next prime is 23277781. The reversal of 23277780 is 8777232.

It can be written as a sum of positive squares in 2 ways, for example, as 11209104 + 12068676 = 3348^2 + 3474^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23277781) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 5565 + ... + 8804.

It is an arithmetic number, because the mean of its divisors is an integer number (1217139).

Almost surely, 2^23277780 is an apocalyptic number.

23277780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23277780 is an abundant number, since it is smaller than the sum of its proper divisors (49750560).

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

23277780 is a wasteful number, since it uses less digits than its factorization.

23277780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14390 (or 14379 counting only the distinct ones).

The product of its (nonzero) digits is 32928, while the sum is 36.

The square root of 23277780 is about 4824.7051723395. The cubic root of 23277780 is about 285.5270027408.

The spelling of 23277780 in words is "twenty-three million, two hundred seventy-seven thousand, seven hundred eighty".