427399402 has 4 divisors (see below), whose sum is σ = 641099106. Its totient is φ = 213699700.

The previous prime is 427399391. The next prime is 427399411. The reversal of 427399402 is 204993724.

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., 363703041 + 63696361 = 19071^2 + 7981^2 .

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 an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106849849 + ... + 106849852.

Almost surely, 2^427399402 is an apocalyptic number.

427399402 is a deficient number, since it is larger than the sum of its proper divisors (213699704).

427399402 is a wasteful number, since it uses less digits than its factorization.

427399402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213699703.

The product of its (nonzero) digits is 108864, while the sum is 40.

The square root of 427399402 is about 20673.6402696767. The cubic root of 427399402 is about 753.2595331068.

The spelling of 427399402 in words is "four hundred twenty-seven million, three hundred ninety-nine thousand, four hundred two".