274405640 has 64 divisors (see below), whose sum is σ = 646652160. Its totient is φ = 104600320.

The previous prime is 274405639. The next prime is 274405643. The reversal of 274405640 is 46504472.

It is a junction number, because it is equal to n+sod(n) for n = 274405597 and 274405606.

It is not an unprimeable number, because it can be changed into a prime (274405643) 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, 423797 + ... + 424443.

It is an arithmetic number, because the mean of its divisors is an integer number (10103940).

Almost surely, 2^274405640 is an apocalyptic number.

274405640 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 274405640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (323326080).

274405640 is an abundant number, since it is smaller than the sum of its proper divisors (372246520).

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

274405640 is a wasteful number, since it uses less digits than its factorization.

274405640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1142 (or 1138 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 32.

The square root of 274405640 is about 16565.1936300183. The cubic root of 274405640 is about 649.8268888115.

The spelling of 274405640 in words is "two hundred seventy-four million, four hundred five thousand, six hundred forty".