1340217730 has 16 divisors (see below), whose sum is σ = 2490211584. Its totient is φ = 518793840.

The previous prime is 1340217719. The next prime is 1340217743. The reversal of 1340217730 is 377120431.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2161332 + ... + 2161951.

It is an arithmetic number, because the mean of its divisors is an integer number (155638224).

Almost surely, 2^1340217730 is an apocalyptic number.

1340217730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1340217730 is a deficient number, since it is larger than the sum of its proper divisors (1149993854).

1340217730 is a wasteful number, since it uses less digits than its factorization.

1340217730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4323321.

The product of its (nonzero) digits is 3528, while the sum is 28.

The square root of 1340217730 is about 36608.9842798185. The cubic root of 1340217730 is about 1102.5334800603.

The spelling of 1340217730 in words is "one billion, three hundred forty million, two hundred seventeen thousand, seven hundred thirty".