57272730 has 16 divisors (see below), whose sum is σ = 137454624. Its totient is φ = 15272720.

The previous prime is 57272729. The next prime is 57272731. The reversal of 57272730 is 3727275.

It is an interprime number because it is at equal distance from previous prime (57272729) and next prime (57272731).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 57272691 and 57272700.

It is not an unprimeable number, because it can be changed into a prime (57272731) 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, 954516 + ... + 954575.

It is an arithmetic number, because the mean of its divisors is an integer number (8590914).

Almost surely, 2^57272730 is an apocalyptic number.

57272730 is an abundant number, since it is smaller than the sum of its proper divisors (80181894).

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

57272730 is a wasteful number, since it uses less digits than its factorization.

57272730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1909101.

The product of its (nonzero) digits is 20580, while the sum is 33.

The square root of 57272730 is about 7567.8748668302. The cubic root of 57272730 is about 385.4629389327.

The spelling of 57272730 in words is "fifty-seven million, two hundred seventy-two thousand, seven hundred thirty".