404012402 has 4 divisors (see below), whose sum is σ = 606018606. Its totient is φ = 202006200.

The previous prime is 404012393. The next prime is 404012407. The reversal of 404012402 is 204210404.

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., 400840441 + 3171961 = 20021^2 + 1781^2 .

It is not an unprimeable number, because it can be changed into a prime (404012407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101003099 + ... + 101003102.

Almost surely, 2^404012402 is an apocalyptic number.

404012402 is a deficient number, since it is larger than the sum of its proper divisors (202006204).

404012402 is a wasteful number, since it uses less digits than its factorization.

404012402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202006203.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 404012402 is about 20100.0597511550. The cubic root of 404012402 is about 739.2617436404.

Adding to 404012402 its reverse (204210404), we get a palindrome (608222806).

The spelling of 404012402 in words is "four hundred four million, twelve thousand, four hundred two".