772089890 has 128 divisors (see below), whose sum is σ = 1739162880. Its totient is φ = 242611200.

The previous prime is 772089887. The next prime is 772089893. The reversal of 772089890 is 98980277.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (772089887) and next prime (772089893).

It is a super-2 number, since 2×772089890² = 1192245596480424200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (772089893) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4265600 + ... + 4265780.

It is an arithmetic number, because the mean of its divisors is an integer number (13587210).

Almost surely, 2^772089890 is an apocalyptic number.

772089890 is an abundant number, since it is smaller than the sum of its proper divisors (967072990).

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

772089890 is a wasteful number, since it uses less digits than its factorization.

772089890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388.

The product of its (nonzero) digits is 508032, while the sum is 50.

The square root of 772089890 is about 27786.5055377606. The cubic root of 772089890 is about 917.3941263792.

The spelling of 772089890 in words is "seven hundred seventy-two million, eighty-nine thousand, eight hundred ninety".