420742736 has 10 divisors (see below), whose sum is σ = 815189082. Its totient is φ = 210371360.

The previous prime is 420742723. The next prime is 420742739. The reversal of 420742736 is 637247024.

It can be written as a sum of positive squares in only one way, i.e., 413878336 + 6864400 = 20344^2 + 2620^2 .

It is a junction number, because it is equal to n+sod(n) for n = 420742696 and 420742705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420742739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13148195 + ... + 13148226.

Almost surely, 2^420742736 is an apocalyptic number.

It is an amenable number.

420742736 is a deficient number, since it is larger than the sum of its proper divisors (394446346).

420742736 is a wasteful number, since it uses less digits than its factorization.

420742736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26296429 (or 26296423 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 35.

The square root of 420742736 is about 20512.0144305721. The cubic root of 420742736 is about 749.3284275742.

The spelling of 420742736 in words is "four hundred twenty million, seven hundred forty-two thousand, seven hundred thirty-six".