261350398 has 16 divisors (see below), whose sum is σ = 408852864. Its totient is φ = 125153280.

The previous prime is 261350393. The next prime is 261350399. The reversal of 261350398 is 893053162.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261350393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15715 + ... + 27742.

It is an arithmetic number, because the mean of its divisors is an integer number (25553304).

Almost surely, 2^261350398 is an apocalyptic number.

261350398 is a deficient number, since it is larger than the sum of its proper divisors (147502466).

261350398 is a wasteful number, since it uses less digits than its factorization.

261350398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43587.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 261350398 is about 16166.3353299380. The cubic root of 261350398 is about 639.3535122176.

The spelling of 261350398 in words is "two hundred sixty-one million, three hundred fifty thousand, three hundred ninety-eight".