407228557 has 4 divisors (see below), whose sum is σ = 431183196. Its totient is φ = 383273920.

The previous prime is 407228543. The next prime is 407228567. The reversal of 407228557 is 755822704.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 329277316 + 77951241 = 18146^2 + 8829^2 .

It is a cyclic number.

It is not a de Polignac number, because 407228557 - 2⁷ = 407228429 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (407228537) 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, 11977294 + ... + 11977327.

It is an arithmetic number, because the mean of its divisors is an integer number (107795799).

Almost surely, 2^407228557 is an apocalyptic number.

It is an amenable number.

407228557 is a deficient number, since it is larger than the sum of its proper divisors (23954639).

407228557 is a wasteful number, since it uses less digits than its factorization.

407228557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23954638.

The product of its (nonzero) digits is 156800, while the sum is 40.

The square root of 407228557 is about 20179.9047817377. The cubic root of 407228557 is about 741.2182010479.

The spelling of 407228557 in words is "four hundred seven million, two hundred twenty-eight thousand, five hundred fifty-seven".