764169840 has 480 divisors, whose sum is σ = 3114848256. Its totient is φ = 164229120.

The previous prime is 764169827. The next prime is 764169841. The reversal of 764169840 is 48961467.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (764169841) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 10468044 + ... + 10468116.

Almost surely, 2^764169840 is an apocalyptic number.

764169840 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 764169840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1557424128).

764169840 is an abundant number, since it is smaller than the sum of its proper divisors (2350678416).

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

764169840 is a wasteful number, since it uses less digits than its factorization.

764169840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197 (or 188 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 764169840 is about 27643.6220492178. The cubic root of 764169840 is about 914.2464816685.

The spelling of 764169840 in words is "seven hundred sixty-four million, one hundred sixty-nine thousand, eight hundred forty".