722457136 has 20 divisors (see below), whose sum is σ = 1401898864. Its totient is φ = 360676800.

The previous prime is 722457119. The next prime is 722457137. The reversal of 722457136 is 631754227.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 722457095 and 722457104.

It is not an unprimeable number, because it can be changed into a prime (722457137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23580 + ... + 44731.

Almost surely, 2^722457136 is an apocalyptic number.

It is an amenable number.

722457136 is a deficient number, since it is larger than the sum of its proper divisors (679441728).

722457136 is a wasteful number, since it uses less digits than its factorization.

722457136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68980 (or 68974 counting only the distinct ones).

The product of its digits is 70560, while the sum is 37.

The square root of 722457136 is about 26878.5627591953. The cubic root of 722457136 is about 897.2993676858.

The spelling of 722457136 in words is "seven hundred twenty-two million, four hundred fifty-seven thousand, one hundred thirty-six".