720157772 has 6 divisors (see below), whose sum is σ = 1260276108. Its totient is φ = 360078884.

The previous prime is 720157721. The next prime is 720157777. The reversal of 720157772 is 277751027.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (720157777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90019718 + ... + 90019725.

It is an arithmetic number, because the mean of its divisors is an integer number (210046018).

Almost surely, 2^720157772 is an apocalyptic number.

It is an amenable number.

720157772 is a deficient number, since it is larger than the sum of its proper divisors (540118336).

720157772 is a wasteful number, since it uses less digits than its factorization.

720157772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180039447 (or 180039445 counting only the distinct ones).

The product of its (nonzero) digits is 48020, while the sum is 38.

The square root of 720157772 is about 26835.7554766025. The cubic root of 720157772 is about 896.3464112144.

The spelling of 720157772 in words is "seven hundred twenty million, one hundred fifty-seven thousand, seven hundred seventy-two".