261846078 has 16 divisors (see below), whose sum is σ = 563976336. Its totient is φ = 80568000.

The previous prime is 261846073. The next prime is 261846103. The reversal of 261846078 is 870648162.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261846073) 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, 1678423 + ... + 1678578.

It is an arithmetic number, because the mean of its divisors is an integer number (35248521).

Almost surely, 2^261846078 is an apocalyptic number.

261846078 is an abundant number, since it is smaller than the sum of its proper divisors (302130258).

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

261846078 is a wasteful number, since it uses less digits than its factorization.

261846078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3357019.

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 261846078 is about 16181.6586912467. The cubic root of 261846078 is about 639.7574585512.

The spelling of 261846078 in words is "two hundred sixty-one million, eight hundred forty-six thousand, seventy-eight".