1340661630 has 64 divisors (see below), whose sum is σ = 4011545088. Its totient is φ = 278578560.

The previous prime is 1340661629. The next prime is 1340661631. The reversal of 1340661630 is 361660431.

It is an interprime number because it is at equal distance from previous prime (1340661629) and next prime (1340661631).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340661631) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 287877 + ... + 292496.

It is an arithmetic number, because the mean of its divisors is an integer number (62680392).

Almost surely, 2^1340661630 is an apocalyptic number.

1340661630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1340661630 is an abundant number, since it is smaller than the sum of its proper divisors (2670883458).

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

1340661630 is a wasteful number, since it uses less digits than its factorization.

1340661630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580401.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 1340661630 is about 36615.0464973076. The cubic root of 1340661630 is about 1102.6551917735.

The spelling of 1340661630 in words is "one billion, three hundred forty million, six hundred sixty-one thousand, six hundred thirty".