261248378 has 8 divisors (see below), whose sum is σ = 391984320. Its totient is φ = 130586940.

The previous prime is 261248363. The next prime is 261248387. The reversal of 261248378 is 873842162.

261248378 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8828 + ... + 24503.

It is an arithmetic number, because the mean of its divisors is an integer number (48998040).

Almost surely, 2^261248378 is an apocalyptic number.

261248378 is a deficient number, since it is larger than the sum of its proper divisors (130735942).

261248378 is a wasteful number, since it uses less digits than its factorization.

261248378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37252.

The product of its digits is 129024, while the sum is 41.

The square root of 261248378 is about 16163.1796995517. The cubic root of 261248378 is about 639.2703093159.

The spelling of 261248378 in words is "two hundred sixty-one million, two hundred forty-eight thousand, three hundred seventy-eight".