501898722 has 64 divisors (see below), whose sum is σ = 1107025920. Its totient is φ = 150753600.

The previous prime is 501898721. The next prime is 501898723. The reversal of 501898722 is 227898105.

It is an interprime number because it is at equal distance from previous prime (501898721) and next prime (501898723).

It is not an unprimeable number, because it can be changed into a prime (501898721) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 878697 + ... + 879267.

It is an arithmetic number, because the mean of its divisors is an integer number (17297280).

Almost surely, 2^501898722 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 501898722, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (553512960).

501898722 is an abundant number, since it is smaller than the sum of its proper divisors (605127198).

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

501898722 is a wasteful number, since it uses less digits than its factorization.

501898722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 839.

The product of its (nonzero) digits is 80640, while the sum is 42.

The square root of 501898722 is about 22403.0962592227. The cubic root of 501898722 is about 794.7039346912.

It can be divided in two parts, 5018 and 98722, that added together give a triangular number (103740 = T₄₅₅).

The spelling of 501898722 in words is "five hundred one million, eight hundred ninety-eight thousand, seven hundred twenty-two".