420370805 has 8 divisors (see below), whose sum is σ = 521839800. Its totient is φ = 324700096.

The previous prime is 420370799. The next prime is 420370837. The reversal of 420370805 is 508073024.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 50154724 + 370216081 = 7082^2 + 19241^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 420370805 - 2¹⁴ = 420354421 is a prime.

It is a super-2 number, since 2×420370805² = 353423227392696050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1449410 + ... + 1449699.

It is an arithmetic number, because the mean of its divisors is an integer number (65229975).

Almost surely, 2^420370805 is an apocalyptic number.

It is an amenable number.

420370805 is a deficient number, since it is larger than the sum of its proper divisors (101468995).

420370805 is a wasteful number, since it uses less digits than its factorization.

420370805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2899143.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 420370805 is about 20502.9462516976. The cubic root of 420370805 is about 749.1075636829.

The spelling of 420370805 in words is "four hundred twenty million, three hundred seventy thousand, eight hundred five".