30400406 has 4 divisors (see below), whose sum is σ = 45600612. Its totient is φ = 15200202.

The previous prime is 30400351. The next prime is 30400417. The reversal of 30400406 is 60400403.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60400403 = 7 ⋅8628629.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7600100 + ... + 7600103.

It is an arithmetic number, because the mean of its divisors is an integer number (11400153).

Almost surely, 2^30400406 is an apocalyptic number.

30400406 is a deficient number, since it is larger than the sum of its proper divisors (15200206).

30400406 is a wasteful number, since it uses less digits than its factorization.

30400406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15200205.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 30400406 is about 5513.6563186329. The cubic root of 30400406 is about 312.0995395197.

Adding to 30400406 its reverse (60400403), we get a palindrome (90800809).

The spelling of 30400406 in words is "thirty million, four hundred thousand, four hundred six".