772643740 has 48 divisors (see below), whose sum is σ = 1863227520. Its totient is φ = 266172480.

The previous prime is 772643717. The next prime is 772643789. The reversal of 772643740 is 47346277.

It is a super-2 number, since 2×772643740² = 1193956697922375200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 772643693 and 772643702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88242 + ... + 96601.

It is an arithmetic number, because the mean of its divisors is an integer number (38817240).

Almost surely, 2^772643740 is an apocalyptic number.

It is an amenable number.

772643740 is an abundant number, since it is smaller than the sum of its proper divisors (1090583780).

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

772643740 is a wasteful number, since it uses less digits than its factorization.

772643740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184882 (or 184880 counting only the distinct ones).

The product of its (nonzero) digits is 197568, while the sum is 40.

The square root of 772643740 is about 27796.4699197578. The cubic root of 772643740 is about 917.6134347347.

The spelling of 772643740 in words is "seven hundred seventy-two million, six hundred forty-three thousand, seven hundred forty".