261195396 has 48 divisors (see below), whose sum is σ = 759843840. Its totient is φ = 67842720.

The previous prime is 261195391. The next prime is 261195397. The reversal of 261195396 is 693591162.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (261195391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140416 + ... + 142263.

It is an arithmetic number, because the mean of its divisors is an integer number (15830080).

Almost surely, 2^261195396 is an apocalyptic number.

It is an amenable number.

261195396 is an abundant number, since it is smaller than the sum of its proper divisors (498648444).

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

261195396 is a wasteful number, since it uses less digits than its factorization.

261195396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282704 (or 282702 counting only the distinct ones).

The product of its digits is 87480, while the sum is 42.

The square root of 261195396 is about 16161.5406443816. The cubic root of 261195396 is about 639.2270910452.

The spelling of 261195396 in words is "two hundred sixty-one million, one hundred ninety-five thousand, three hundred ninety-six".