1430399864 has 8 divisors (see below), whose sum is σ = 2681999760. Its totient is φ = 715199928.

The previous prime is 1430399809. The next prime is 1430399869. The reversal of 1430399864 is 4689930341.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1430399869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 89399984 + ... + 89399999.

It is an arithmetic number, because the mean of its divisors is an integer number (335249970).

Almost surely, 2^1430399864 is an apocalyptic number.

It is an amenable number.

1430399864 is a deficient number, since it is larger than the sum of its proper divisors (1251599896).

1430399864 is a wasteful number, since it uses less digits than its factorization.

1430399864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178799989 (or 178799985 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 47.

The square root of 1430399864 is about 37820.6274934724. The cubic root of 1430399864 is about 1126.7281722820.

The spelling of 1430399864 in words is "one billion, four hundred thirty million, three hundred ninety-nine thousand, eight hundred sixty-four".