420899578 has 16 divisors (see below), whose sum is σ = 692976096. Its totient is φ = 190142640.

The previous prime is 420899513. The next prime is 420899579. The reversal of 420899578 is 875998024.

It is a super-4 number, since 4×420899578⁴ (a number of 36 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (420899579) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55101 + ... + 62272.

It is an arithmetic number, because the mean of its divisors is an integer number (43311006).

Almost surely, 2^420899578 is an apocalyptic number.

420899578 is a deficient number, since it is larger than the sum of its proper divisors (272076518).

420899578 is a wasteful number, since it uses less digits than its factorization.

420899578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117549.

The product of its (nonzero) digits is 1451520, while the sum is 52.

The square root of 420899578 is about 20515.8372483309. The cubic root of 420899578 is about 749.4215260868.

It can be divided in two parts, 420 and 899578, that added together give a palindrome (899998).

The spelling of 420899578 in words is "four hundred twenty million, eight hundred ninety-nine thousand, five hundred seventy-eight".