764526840 has 256 divisors, whose sum is σ = 2892395520. Its totient is φ = 157040640.

The previous prime is 764526811. The next prime is 764526853. The reversal of 764526840 is 48625467.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 764526792 and 764526801.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 895854 + ... + 896706.

It is an arithmetic number, because the mean of its divisors is an integer number (11298420).

Almost surely, 2^764526840 is an apocalyptic number.

764526840 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 764526840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1446197760).

764526840 is an abundant number, since it is smaller than the sum of its proper divisors (2127868680).

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

764526840 is a wasteful number, since it uses less digits than its factorization.

764526840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 982 (or 978 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 42.

The square root of 764526840 is about 27650.0784809013. The cubic root of 764526840 is about 914.3888301202.

The spelling of 764526840 in words is "seven hundred sixty-four million, five hundred twenty-six thousand, eight hundred forty".