261483950 has 96 divisors (see below), whose sum is σ = 605586240. Its totient is φ = 81792000.

The previous prime is 261483877. The next prime is 261483961. The reversal of 261483950 is 59384162.

It is a happy number.

It is a super-2 number, since 2×261483950² = 136747712215205000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 459266 + ... + 459834.

It is an arithmetic number, because the mean of its divisors is an integer number (6308190).

Almost surely, 2^261483950 is an apocalyptic number.

261483950 is an abundant number, since it is smaller than the sum of its proper divisors (344102290).

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

261483950 is a wasteful number, since it uses less digits than its factorization.

261483950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702 (or 697 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 261483950 is about 16170.4653612690. The cubic root of 261483950 is about 639.4623984748.

The spelling of 261483950 in words is "two hundred sixty-one million, four hundred eighty-three thousand, nine hundred fifty".