261233788 has 12 divisors (see below), whose sum is σ = 457296840. Its totient is φ = 130577552.

The previous prime is 261233783. The next prime is 261233789. The reversal of 261233788 is 887332162.

It is a super-4 number, since 4×261233788⁴ (a number of 35 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 261233788.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261233783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9195 + ... + 24637.

It is an arithmetic number, because the mean of its divisors is an integer number (38108070).

Almost surely, 2^261233788 is an apocalyptic number.

It is an amenable number.

261233788 is a deficient number, since it is larger than the sum of its proper divisors (196063052).

261233788 is a wasteful number, since it uses less digits than its factorization.

261233788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19676 (or 19674 counting only the distinct ones).

The product of its digits is 96768, while the sum is 40.

The square root of 261233788 is about 16162.7283587889. The cubic root of 261233788 is about 639.2584086010.

The spelling of 261233788 in words is "two hundred sixty-one million, two hundred thirty-three thousand, seven hundred eighty-eight".