261057238 has 32 divisors (see below), whose sum is σ = 430416000. Its totient is φ = 118025856.

The previous prime is 261057221. The next prime is 261057347. The reversal of 261057238 is 832750162.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 305620 + ... + 306472.

It is an arithmetic number, because the mean of its divisors is an integer number (13450500).

Almost surely, 2^261057238 is an apocalyptic number.

261057238 is a deficient number, since it is larger than the sum of its proper divisors (169358762).

261057238 is a wasteful number, since it uses less digits than its factorization.

261057238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1096.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 261057238 is about 16157.2657959198. The cubic root of 261057238 is about 639.1143658421.

The spelling of 261057238 in words is "two hundred sixty-one million, fifty-seven thousand, two hundred thirty-eight".