1429620640 has 48 divisors (see below), whose sum is σ = 3859978752. Its totient is φ = 490155264.

The previous prime is 1429620623. The next prime is 1429620649. The reversal of 1429620640 is 460269241.

It is a junction number, because it is equal to n+sod(n) for n = 1429620596 and 1429620605.

It is not an unprimeable number, because it can be changed into a prime (1429620649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 637104 + ... + 639343.

It is an arithmetic number, because the mean of its divisors is an integer number (80416224).

Almost surely, 2^1429620640 is an apocalyptic number.

1429620640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1429620640 is an abundant number, since it is smaller than the sum of its proper divisors (2430358112).

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

1429620640 is a wasteful number, since it uses less digits than its factorization.

1429620640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1276469 (or 1276461 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 1429620640 is about 37810.3245159308. The cubic root of 1429620640 is about 1126.5235364707.

Adding to 1429620640 its reverse (460269241), we get a palindrome (1889889881).

The spelling of 1429620640 in words is "one billion, four hundred twenty-nine million, six hundred twenty thousand, six hundred forty".