1340903820 has 48 divisors (see below), whose sum is σ = 3756140640. Its totient is φ = 357421056.

The previous prime is 1340903813. The next prime is 1340903821. The reversal of 1340903820 is 283090431.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (1340903821) 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, 237996 + ... + 243564.

It is an arithmetic number, because the mean of its divisors is an integer number (78252930).

Almost surely, 2^1340903820 is an apocalyptic number.

1340903820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1340903820 is an abundant number, since it is smaller than the sum of its proper divisors (2415236820).

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

1340903820 is a wasteful number, since it uses less digits than its factorization.

1340903820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9594 (or 9592 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 1340903820 is about 36618.3535948846. The cubic root of 1340903820 is about 1102.7215858522.

The spelling of 1340903820 in words is "one billion, three hundred forty million, nine hundred three thousand, eight hundred twenty".