427573778 has 4 divisors (see below), whose sum is σ = 641360670. Its totient is φ = 213786888.

The previous prime is 427573771. The next prime is 427573823. The reversal of 427573778 is 877375724.

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

It can be written as a sum of positive squares in only one way, i.e., 413186929 + 14386849 = 20327^2 + 3793^2 .

It is not an unprimeable number, because it can be changed into a prime (427573771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106893443 + ... + 106893446.

Almost surely, 2^427573778 is an apocalyptic number.

427573778 is a deficient number, since it is larger than the sum of its proper divisors (213786892).

427573778 is a wasteful number, since it uses less digits than its factorization.

427573778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213786891.

The product of its digits is 2304960, while the sum is 50.

The square root of 427573778 is about 20677.8571907246. The cubic root of 427573778 is about 753.3619607381.

The spelling of 427573778 in words is "four hundred twenty-seven million, five hundred seventy-three thousand, seven hundred seventy-eight".