1431720620 has 48 divisors (see below), whose sum is σ = 3472888608. Its totient is φ = 489999360.

The previous prime is 1431720617. The next prime is 1431720643. The reversal of 1431720620 is 260271341.

It is a self number, because there is not a number n which added to its sum of digits gives 1431720620.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 187667 + ... + 195146.

It is an arithmetic number, because the mean of its divisors is an integer number (72351846).

Almost surely, 2^1431720620 is an apocalyptic number.

1431720620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1431720620 is an abundant number, since it is smaller than the sum of its proper divisors (2041167988).

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

1431720620 is a wasteful number, since it uses less digits than its factorization.

1431720620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382850 (or 382848 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 1431720620 is about 37838.0842538308. The cubic root of 1431720620 is about 1127.0748527790.

Adding to 1431720620 its reverse (260271341), we get a palindrome (1691991961).

The spelling of 1431720620 in words is "one billion, four hundred thirty-one million, seven hundred twenty thousand, six hundred twenty".