771328072 has 8 divisors (see below), whose sum is σ = 1446240150. Its totient is φ = 385664032.

The previous prime is 771328057. The next prime is 771328099. The reversal of 771328072 is 270823177.

It can be written as a sum of positive squares in only one way, i.e., 764743716 + 6584356 = 27654^2 + 2566^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48207997 + ... + 48208012.

Almost surely, 2^771328072 is an apocalyptic number.

It is an amenable number.

771328072 is a deficient number, since it is larger than the sum of its proper divisors (674912078).

771328072 is a wasteful number, since it uses less digits than its factorization.

771328072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96416015 (or 96416011 counting only the distinct ones).

The product of its (nonzero) digits is 32928, while the sum is 37.

The square root of 771328072 is about 27772.7937377571. The cubic root of 771328072 is about 917.0922973837.

The spelling of 771328072 in words is "seven hundred seventy-one million, three hundred twenty-eight thousand, seventy-two".