764123140 has 48 divisors (see below), whose sum is σ = 1853518464. Its totient is φ = 261516800.

The previous prime is 764123137. The next prime is 764123147. The reversal of 764123140 is 41321467.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 764123099 and 764123108.

It is not an unprimeable number, because it can be changed into a prime (764123147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98416 + ... + 105895.

It is an arithmetic number, because the mean of its divisors is an integer number (38614968).

Almost surely, 2^764123140 is an apocalyptic number.

It is an amenable number.

764123140 is an abundant number, since it is smaller than the sum of its proper divisors (1089395324).

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

764123140 is a wasteful number, since it uses less digits than its factorization.

764123140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204348 (or 204346 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 764123140 is about 27642.7773568431. Note that the first 3 decimals coincide. The cubic root of 764123140 is about 914.2278574577.

It can be divided in two parts, 764 and 123140, that added together give a square (123904 = 352²).

The spelling of 764123140 in words is "seven hundred sixty-four million, one hundred twenty-three thousand, one hundred forty".