195278940 has 72 divisors (see below), whose sum is σ = 595865088. Its totient is φ = 51765120.

The previous prime is 195278939. The next prime is 195278969. The reversal of 195278940 is 49872591.

195278940 is a `hidden beast` number, since 1 + 9 + 527 + 89 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28005 + ... + 34275.

It is an arithmetic number, because the mean of its divisors is an integer number (8275904).

Almost surely, 2^195278940 is an apocalyptic number.

195278940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 195278940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (297932544).

195278940 is an abundant number, since it is smaller than the sum of its proper divisors (400586148).

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

195278940 is a wasteful number, since it uses less digits than its factorization.

195278940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6459 (or 6454 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The square root of 195278940 is about 13974.2241287307. The cubic root of 195278940 is about 580.1653709975.

The spelling of 195278940 in words is "one hundred ninety-five million, two hundred seventy-eight thousand, nine hundred forty".