420477730 has 8 divisors (see below), whose sum is σ = 756859932. Its totient is φ = 168191088.

The previous prime is 420477727. The next prime is 420477749. The reversal of 420477730 is 37774024.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 367143921 + 53333809 = 19161^2 + 7303^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21023877 + ... + 21023896.

Almost surely, 2^420477730 is an apocalyptic number.

420477730 is a deficient number, since it is larger than the sum of its proper divisors (336382202).

420477730 is a wasteful number, since it uses less digits than its factorization.

420477730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42047780.

The product of its (nonzero) digits is 32928, while the sum is 34.

The square root of 420477730 is about 20505.5536379782. The cubic root of 420477730 is about 749.1710723242.

The spelling of 420477730 in words is "four hundred twenty million, four hundred seventy-seven thousand, seven hundred thirty".