764212840 has 32 divisors (see below), whose sum is σ = 1748628000. Its totient is φ = 300503104.

The previous prime is 764212783. The next prime is 764212853. The reversal of 764212840 is 48212467.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 764212796 and 764212805.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 159550 + ... + 164269.

It is an arithmetic number, because the mean of its divisors is an integer number (54644625).

Almost surely, 2^764212840 is an apocalyptic number.

It is an amenable number.

764212840 is an abundant number, since it is smaller than the sum of its proper divisors (984415160).

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

764212840 is a wasteful number, since it uses less digits than its factorization.

764212840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323889 (or 323885 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 764212840 is about 27644.3997945334. The cubic root of 764212840 is about 914.2636296284.

The spelling of 764212840 in words is "seven hundred sixty-four million, two hundred twelve thousand, eight hundred forty".