1429778465 has 8 divisors (see below), whose sum is σ = 1716071400. Its totient is φ = 1143597952.

The previous prime is 1429778407. The next prime is 1429778477. The reversal of 1429778465 is 5648779241.

It can be written as a sum of positive squares in 4 ways, for example, as 77598481 + 1352179984 = 8809^2 + 36772^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1429778465 - 2⁶ = 1429778401 is a prime.

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, 3011 + ... + 53559.

It is an arithmetic number, because the mean of its divisors is an integer number (214508925).

Almost surely, 2^1429778465 is an apocalyptic number.

It is an amenable number.

1429778465 is a deficient number, since it is larger than the sum of its proper divisors (286292935).

1429778465 is an equidigital number, since it uses as much as digits as its factorization.

1429778465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56211.

The product of its digits is 3386880, while the sum is 53.

The square root of 1429778465 is about 37812.4115205576. The cubic root of 1429778465 is about 1126.5649896670.

The spelling of 1429778465 in words is "one billion, four hundred twenty-nine million, seven hundred seventy-eight thousand, four hundred sixty-five".