771240072 has 32 divisors (see below), whose sum is σ = 1990298880. Its totient is φ = 248786880.

The previous prime is 771240031. The next prime is 771240079. The reversal of 771240072 is 270042177.

It is a super-2 number, since 2×771240072² = 1189622497317130368, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (771240079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 517563 + ... + 519050.

It is an arithmetic number, because the mean of its divisors is an integer number (62196840).

Almost surely, 2^771240072 is an apocalyptic number.

It is an amenable number.

771240072 is an abundant number, since it is smaller than the sum of its proper divisors (1219058808).

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

771240072 is a wasteful number, since it uses less digits than its factorization.

771240072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1036653 (or 1036649 counting only the distinct ones).

The product of its (nonzero) digits is 5488, while the sum is 30.

The square root of 771240072 is about 27771.2094083063. The cubic root of 771240072 is about 917.0574193621.

The spelling of 771240072 in words is "seven hundred seventy-one million, two hundred forty thousand, seventy-two".