557778730 has 8 divisors (see below), whose sum is σ = 1004001732. Its totient is φ = 223111488.

The previous prime is 557778713. The next prime is 557778733. The reversal of 557778730 is 37877755.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 452285289 + 105493441 = 21267^2 + 10271^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×557778730² = 622234223280825800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (557778733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27888927 + ... + 27888946.

Almost surely, 2^557778730 is an apocalyptic number.

557778730 is a deficient number, since it is larger than the sum of its proper divisors (446223002).

557778730 is a wasteful number, since it uses less digits than its factorization.

557778730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55777880.

The product of its (nonzero) digits is 1440600, while the sum is 49.

The square root of 557778730 is about 23617.3396046210. The cubic root of 557778730 is about 823.1657959066.

The spelling of 557778730 in words is "five hundred fifty-seven million, seven hundred seventy-eight thousand, seven hundred thirty".