57240306 has 12 divisors (see below), whose sum is σ = 124020702. Its totient is φ = 19080096.

The previous prime is 57240301. The next prime is 57240341. The reversal of 57240306 is 60304275.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 45441081 + 11799225 = 6741^2 + 3435^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 57240306.

It is not an unprimeable number, because it can be changed into a prime (57240301) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1589991 + ... + 1590026.

Almost surely, 2^57240306 is an apocalyptic number.

57240306 is an abundant number, since it is smaller than the sum of its proper divisors (66780396).

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

57240306 is a wasteful number, since it uses less digits than its factorization.

57240306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3180025 (or 3180022 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 57240306 is about 7565.7323505395. The cubic root of 57240306 is about 385.3901840653.

It can be divided in two parts, 5724030 and 6, that added together give a triangular number (5724036 = T₃₃₈₃).

The spelling of 57240306 in words is "fifty-seven million, two hundred forty thousand, three hundred six".