385660772 has 18 divisors (see below), whose sum is σ = 785095542. Its totient is φ = 165283104.

The previous prime is 385660733. The next prime is 385660783. The reversal of 385660772 is 277066583.

385660772 = T₃₉₄₃ + T₃₉₄₄ + ... + T₃₉₉₁.

It can be written as a sum of positive squares in only one way, i.e., 203518756 + 182142016 = 14266^2 + 13496^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 983633 + ... + 984024.

It is an arithmetic number, because the mean of its divisors is an integer number (43616419).

Almost surely, 2^385660772 is an apocalyptic number.

It is an amenable number.

385660772 is an abundant number, since it is smaller than the sum of its proper divisors (399434770).

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

385660772 is a wasteful number, since it uses less digits than its factorization.

385660772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1967675 (or 1967666 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 44.

The square root of 385660772 is about 19638.2476815015. The cubic root of 385660772 is about 727.8945853284.

The spelling of 385660772 in words is "three hundred eighty-five million, six hundred sixty thousand, seven hundred seventy-two".