261440300 has 36 divisors (see below), whose sum is σ = 618903096. Its totient is φ = 95068800.

The previous prime is 261440243. The next prime is 261440321. The reversal of 261440300 is 3044162.

It is a happy number.

261440300 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 117737 + ... + 119936.

Almost surely, 2^261440300 is an apocalyptic number.

261440300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

261440300 is an abundant number, since it is smaller than the sum of its proper divisors (357462796).

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

261440300 is a wasteful number, since it uses less digits than its factorization.

261440300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237698 (or 237691 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 261440300 is about 16169.1156220741. The cubic root of 261440300 is about 639.4268142805.

Adding to 261440300 its reverse (3044162), we get a palindrome (264484462).

The spelling of 261440300 in words is "two hundred sixty-one million, four hundred forty thousand, three hundred".