272555640 has 144 divisors (see below), whose sum is σ = 1030493880. Its totient is φ = 62294400.

The previous prime is 272555639. The next prime is 272555641. The reversal of 272555640 is 46555272.

272555640 is a `hidden beast` number, since 2 + 7 + 2 + 5 + 5 + 5 + 640 = 666.

It is an interprime number because it is at equal distance from previous prime (272555639) and next prime (272555641).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 272555595 and 272555604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (272555641) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 9915 + ... + 25365.

Almost surely, 2^272555640 is an apocalyptic number.

272555640 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 272555640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (515246940).

272555640 is an abundant number, since it is smaller than the sum of its proper divisors (757938240).

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

272555640 is a wasteful number, since it uses less digits than its factorization.

272555640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15482 (or 15468 counting only the distinct ones).

The product of its (nonzero) digits is 84000, while the sum is 36.

The square root of 272555640 is about 16509.2592202073. The cubic root of 272555640 is about 648.3632508375.

The spelling of 272555640 in words is "two hundred seventy-two million, five hundred fifty-five thousand, six hundred forty".