557287890 has 32 divisors (see below), whose sum is σ = 1341869760. Its totient is φ = 148123584.

The previous prime is 557287889. The next prime is 557287891. The reversal of 557287890 is 98782755.

It is an interprime number because it is at equal distance from previous prime (557287889) and next prime (557287891).

It is not an unprimeable number, because it can be changed into a prime (557287891) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21045 + ... + 39464.

It is an arithmetic number, because the mean of its divisors is an integer number (41933430).

Almost surely, 2^557287890 is an apocalyptic number.

557287890 is an abundant number, since it is smaller than the sum of its proper divisors (784581870).

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

557287890 is a wasteful number, since it uses less digits than its factorization.

557287890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60826.

The product of its (nonzero) digits is 1411200, while the sum is 51.

The square root of 557287890 is about 23606.9457999124. The cubic root of 557287890 is about 822.9242656764.

The spelling of 557287890 in words is "five hundred fifty-seven million, two hundred eighty-seven thousand, eight hundred ninety".