722165136 has 240 divisors, whose sum is σ = 2399275008. Its totient is φ = 185068800.

The previous prime is 722165123. The next prime is 722165173. The reversal of 722165136 is 631561227.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 722165097 and 722165106.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2664681 + ... + 2664951.

Almost surely, 2^722165136 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 722165136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1199637504).

722165136 is an abundant number, since it is smaller than the sum of its proper divisors (1677109872).

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

722165136 is a wasteful number, since it uses less digits than its factorization.

722165136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410 (or 397 counting only the distinct ones).

The product of its digits is 15120, while the sum is 33.

The square root of 722165136 is about 26873.1303721766. The cubic root of 722165136 is about 897.1784623708.

The spelling of 722165136 in words is "seven hundred twenty-two million, one hundred sixty-five thousand, one hundred thirty-six".