722355648 has 84 divisors (see below), whose sum is σ = 2223299592. Its totient is φ = 206384640.

The previous prime is 722355629. The next prime is 722355677. The reversal of 722355648 is 846553227.

It is a tau number, because it is divible by the number of its divisors (84).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28983 + ... + 47798.

Almost surely, 2^722355648 is an apocalyptic number.

It is an amenable number.

722355648 is an abundant number, since it is smaller than the sum of its proper divisors (1500943944).

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

722355648 is a wasteful number, since it uses less digits than its factorization.

722355648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76810 (or 76793 counting only the distinct ones).

The product of its digits is 403200, while the sum is 42.

The square root of 722355648 is about 26876.6747943268. The cubic root of 722355648 is about 897.2573493302.

It can be divided in two parts, 722355 and 648, that added together give a triangular number (723003 = T₁₂₀₂).

The spelling of 722355648 in words is "seven hundred twenty-two million, three hundred fifty-five thousand, six hundred forty-eight".