420400454 has 8 divisors (see below), whose sum is σ = 636181560. Its totient is φ = 208339936.

The previous prime is 420400451. The next prime is 420400523. The reversal of 420400454 is 454004024.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×420400454² = 353473083446812232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420400451) 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, 929864 + ... + 930315.

It is an arithmetic number, because the mean of its divisors is an integer number (79522695).

Almost surely, 2^420400454 is an apocalyptic number.

420400454 is a deficient number, since it is larger than the sum of its proper divisors (215781106).

420400454 is a wasteful number, since it uses less digits than its factorization.

420400454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1860294.

The product of its (nonzero) digits is 2560, while the sum is 23.

The square root of 420400454 is about 20503.6692813750. The cubic root of 420400454 is about 749.1251749345.

Adding to 420400454 its reverse (454004024), we get a palindrome (874404478).

The spelling of 420400454 in words is "four hundred twenty million, four hundred thousand, four hundred fifty-four".