420731736 has 64 divisors (see below), whose sum is σ = 1084039680. Its totient is φ = 135976320.

The previous prime is 420731723. The next prime is 420731743. The reversal of 420731736 is 637137024.

It is a junction number, because it is equal to n+sod(n) for n = 420731697 and 420731706.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 325251 + ... + 326541.

It is an arithmetic number, because the mean of its divisors is an integer number (16938120).

Almost surely, 2^420731736 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 420731736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (542019840).

420731736 is an abundant number, since it is smaller than the sum of its proper divisors (663307944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

420731736 is a wasteful number, since it uses less digits than its factorization.

420731736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1704 (or 1700 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 33.

The square root of 420731736 is about 20511.7462932828. The cubic root of 420731736 is about 749.3218973093.

The spelling of 420731736 in words is "four hundred twenty million, seven hundred thirty-one thousand, seven hundred thirty-six".