501944436 has 216 divisors, whose sum is σ = 1557593856. Its totient is φ = 135717120.

The previous prime is 501944411. The next prime is 501944459. The reversal of 501944436 is 634449105.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 501944436.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3663760 + ... + 3663896.

Almost surely, 2^501944436 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 501944436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (778796928).

501944436 is an abundant number, since it is smaller than the sum of its proper divisors (1055649420).

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

501944436 is a wasteful number, since it uses less digits than its factorization.

501944436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259 (or 247 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 501944436 is about 22404.1164967512. The cubic root of 501944436 is about 794.7280617319.

It can be divided in two parts, 5019 and 44436, that added together give a triangular number (49455 = T₃₁₄).

The spelling of 501944436 in words is "five hundred one million, nine hundred forty-four thousand, four hundred thirty-six".