420729730 has 16 divisors (see below), whose sum is σ = 797172480. Its totient is φ = 159434352.

The previous prime is 420729721. The next prime is 420729781. The reversal of 420729730 is 37927024.

It is a super-3 number, since 3×420729730³ (a number of 27 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1106994 + ... + 1107373.

It is an arithmetic number, because the mean of its divisors is an integer number (49823280).

Almost surely, 2^420729730 is an apocalyptic number.

420729730 is a deficient number, since it is larger than the sum of its proper divisors (376442750).

420729730 is a wasteful number, since it uses less digits than its factorization.

420729730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2214393.

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 420729730 is about 20511.6973944138. The cubic root of 420729730 is about 749.3207064142.

The spelling of 420729730 in words is "four hundred twenty million, seven hundred twenty-nine thousand, seven hundred thirty".