420355904 has 14 divisors (see below), whose sum is σ = 834143874. Its totient is φ = 210177920.

The previous prime is 420355847. The next prime is 420355931. The reversal of 420355904 is 409553024.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 257538304 + 162817600 = 16048^2 + 12760^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

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, 3283967 + ... + 3284094.

Almost surely, 2^420355904 is an apocalyptic number.

It is an amenable number.

420355904 is a deficient number, since it is larger than the sum of its proper divisors (413787970).

420355904 is an equidigital number, since it uses as much as digits as its factorization.

420355904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6568073 (or 6568063 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 420355904 is about 20502.5828616787. The cubic root of 420355904 is about 749.0987123041.

The spelling of 420355904 in words is "four hundred twenty million, three hundred fifty-five thousand, nine hundred four".