274243640 has 32 divisors (see below), whose sum is σ = 673144560. Its totient is φ = 99724800.

The previous prime is 274243603. The next prime is 274243649. The reversal of 274243640 is 46342472.

It is a junction number, because it is equal to n+sod(n) for n = 274243597 and 274243606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (274243649) 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, 311201 + ... + 312080.

Almost surely, 2^274243640 is an apocalyptic number.

274243640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

274243640 is an abundant number, since it is smaller than the sum of its proper divisors (398900920).

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

274243640 is a wasteful number, since it uses less digits than its factorization.

274243640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623303 (or 623299 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 32.

The square root of 274243640 is about 16560.3031373221. The cubic root of 274243640 is about 649.6989848817.

The spelling of 274243640 in words is "two hundred seventy-four million, two hundred forty-three thousand, six hundred forty".