274857820 has 72 divisors (see below), whose sum is σ = 612608976. Its totient is φ = 103564032.

The previous prime is 274857799. The next prime is 274857823. The reversal of 274857820 is 28758472.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (274857823) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 877984 + ... + 878296.

It is an arithmetic number, because the mean of its divisors is an integer number (8508458).

Almost surely, 2^274857820 is an apocalyptic number.

274857820 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 274857820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (306304488).

274857820 is an abundant number, since it is smaller than the sum of its proper divisors (337751156).

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

274857820 is a wasteful number, since it uses less digits than its factorization.

274857820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451 (or 426 counting only the distinct ones).

The product of its (nonzero) digits is 250880, while the sum is 43.

The square root of 274857820 is about 16578.8365092367. The cubic root of 274857820 is about 650.1836325349.

The spelling of 274857820 in words is "two hundred seventy-four million, eight hundred fifty-seven thousand, eight hundred twenty".