23277640 has 16 divisors (see below), whose sum is σ = 52374780. Its totient is φ = 9311040.

The previous prime is 23277637. The next prime is 23277659. The reversal of 23277640 is 4677232.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 23213124 + 64516 = 4818^2 + 254^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 290931 + ... + 291010.

Almost surely, 2^23277640 is an apocalyptic number.

23277640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23277640 is an abundant number, since it is smaller than the sum of its proper divisors (29097140).

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

23277640 is a wasteful number, since it uses less digits than its factorization.

23277640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581952 (or 581948 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 31.

The square root of 23277640 is about 4824.6906636592. The cubic root of 23277640 is about 285.5264303228.

The spelling of 23277640 in words is "twenty-three million, two hundred seventy-seven thousand, six hundred forty".