261063928 has 8 divisors (see below), whose sum is σ = 489494880. Its totient is φ = 130531960.

The previous prime is 261063877. The next prime is 261063937. The reversal of 261063928 is 829360162.

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16316488 + ... + 16316503.

It is an arithmetic number, because the mean of its divisors is an integer number (61186860).

Almost surely, 2^261063928 is an apocalyptic number.

It is an amenable number.

261063928 is a deficient number, since it is larger than the sum of its proper divisors (228430952).

261063928 is a wasteful number, since it uses less digits than its factorization.

261063928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32632997 (or 32632993 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 261063928 is about 16157.4728221959. The cubic root of 261063928 is about 639.1198252305.

The spelling of 261063928 in words is "two hundred sixty-one million, sixty-three thousand, nine hundred twenty-eight".