772120028 has 18 divisors (see below), whose sum is σ = 1410445176. Its totient is φ = 369147328.

The previous prime is 772120021. The next prime is 772120031. The reversal of 772120028 is 820021277.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (772120021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 265076 + ... + 267972.

Almost surely, 2^772120028 is an apocalyptic number.

It is an amenable number.

772120028 is a deficient number, since it is larger than the sum of its proper divisors (638325148).

772120028 is an equidigital number, since it uses as much as digits as its factorization.

772120028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5821 (or 2922 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 772120028 is about 27787.0478460739. The cubic root of 772120028 is about 917.4060628410.

The spelling of 772120028 in words is "seven hundred seventy-two million, one hundred twenty thousand, twenty-eight".