261436700 has 72 divisors (see below), whose sum is σ = 653541504. Its totient is φ = 88920000.

The previous prime is 261436673. The next prime is 261436753. The reversal of 261436700 is 7634162.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 90275 + ... + 93125.

Almost surely, 2^261436700 is an apocalyptic number.

261436700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 261436700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (326770752).

261436700 is an abundant number, since it is smaller than the sum of its proper divisors (392104804).

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

261436700 is a wasteful number, since it uses less digits than its factorization.

261436700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3003 (or 2996 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 261436700 is about 16169.0042983481. The cubic root of 261436700 is about 639.4238793248.

The spelling of 261436700 in words is "two hundred sixty-one million, four hundred thirty-six thousand, seven hundred".