501640722 has 32 divisors (see below), whose sum is σ = 1216100160. Its totient is φ = 152012160.

The previous prime is 501640697. The next prime is 501640747. The reversal of 501640722 is 227046105.

It is an interprime number because it is at equal distance from previous prime (501640697) and next prime (501640747).

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 421663 + ... + 422850.

It is an arithmetic number, because the mean of its divisors is an integer number (38003130).

Almost surely, 2^501640722 is an apocalyptic number.

501640722 is an abundant number, since it is smaller than the sum of its proper divisors (714459438).

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

501640722 is a wasteful number, since it uses less digits than its factorization.

501640722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 844535 (or 844529 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 501640722 is about 22397.3373863948. The cubic root of 501640722 is about 794.5677393802.

Adding to 501640722 its reverse (227046105), we get a palindrome (728686827).

The spelling of 501640722 in words is "five hundred one million, six hundred forty thousand, seven hundred twenty-two".