1429451640 has 96 divisors (see below), whose sum is σ = 4670265600. Its totient is φ = 379173120.

The previous prime is 1429451629. The next prime is 1429451657. The reversal of 1429451640 is 461549241.

1429451640 is a `hidden beast` number, since 1 + 4 + 2 + 9 + 4 + 5 + 1 + 640 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1429451595 and 1429451604.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58366 + ... + 79154.

It is an arithmetic number, because the mean of its divisors is an integer number (48648600).

Almost surely, 2^1429451640 is an apocalyptic number.

1429451640 is a gapful number since it is divisible by the number (10) 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 1429451640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2335132800).

1429451640 is an abundant number, since it is smaller than the sum of its proper divisors (3240813960).

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

1429451640 is a wasteful number, since it uses less digits than its factorization.

1429451640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20997 (or 20990 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 1429451640 is about 37808.0896105582. The cubic root of 1429451640 is about 1126.4791447454.

The spelling of 1429451640 in words is "one billion, four hundred twenty-nine million, four hundred fifty-one thousand, six hundred forty".