275801640 has 128 divisors (see below), whose sum is σ = 857088000. Its totient is φ = 70956288.

The previous prime is 275801627. The next prime is 275801683. The reversal of 275801640 is 46108572.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 445251 + ... + 445869.

It is an arithmetic number, because the mean of its divisors is an integer number (6696000).

Almost surely, 2^275801640 is an apocalyptic number.

275801640 is a gapful number since it is divisible by the number (20) 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 275801640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (428544000).

275801640 is an abundant number, since it is smaller than the sum of its proper divisors (581286360).

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

275801640 is a wasteful number, since it uses less digits than its factorization.

275801640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 759 (or 755 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 275801640 is about 16607.2767183545. The cubic root of 275801640 is about 650.9269929289.

The spelling of 275801640 in words is "two hundred seventy-five million, eight hundred one thousand, six hundred forty".