274485840 has 80 divisors (see below), whose sum is σ = 862617408. Its totient is φ = 72188928.

The previous prime is 274485839. The next prime is 274485853. The reversal of 274485840 is 48584472.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 274485792 and 274485801.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9687 + ... + 25353.

Almost surely, 2^274485840 is an apocalyptic number.

274485840 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 274485840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (431308704).

274485840 is an abundant number, since it is smaller than the sum of its proper divisors (588131568).

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

274485840 is a wasteful number, since it uses less digits than its factorization.

274485840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15756 (or 15750 counting only the distinct ones).

The product of its (nonzero) digits is 286720, while the sum is 42.

The square root of 274485840 is about 16567.6141915485. The cubic root of 274485840 is about 649.8901905231.

The spelling of 274485840 in words is "two hundred seventy-four million, four hundred eighty-five thousand, eight hundred forty".