1429780381 has 16 divisors (see below), whose sum is σ = 1548028800. Its totient is φ = 1315942848.

The previous prime is 1429780367. The next prime is 1429780397. The reversal of 1429780381 is 1830879241.

It is a cyclic number.

It is not a de Polignac number, because 1429780381 - 2²³ = 1421391773 is a prime.

It is a super-2 number, since 2×1429780381² = 4088543875785010322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1429780081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 690015 + ... + 692083.

It is an arithmetic number, because the mean of its divisors is an integer number (96751800).

Almost surely, 2^1429780381 is an apocalyptic number.

It is an amenable number.

1429780381 is a deficient number, since it is larger than the sum of its proper divisors (118248419).

1429780381 is a wasteful number, since it uses less digits than its factorization.

1429780381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3108.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 1429780381 is about 37812.4368561456. The cubic root of 1429780381 is about 1126.5654928912.

The spelling of 1429780381 in words is "one billion, four hundred twenty-nine million, seven hundred eighty thousand, three hundred eighty-one".