1340090640 has 120 divisors (see below), whose sum is σ = 5143414848. Its totient is φ = 306305280.

The previous prime is 1340090627. The next prime is 1340090663. The reversal of 1340090640 is 460900431.

1340090640 is a `hidden beast` number, since 13 + 4 + 0 + 0 + 9 + 0 + 640 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 127906 + ... + 137985.

Almost surely, 2^1340090640 is an apocalyptic number.

1340090640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1340090640 is an abundant number, since it is smaller than the sum of its proper divisors (3803324208).

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

1340090640 is a wasteful number, since it uses less digits than its factorization.

1340090640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265917 (or 265908 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 1340090640 is about 36607.2484625654. The cubic root of 1340090640 is about 1102.4986286561.

The spelling of 1340090640 in words is "one billion, three hundred forty million, ninety thousand, six hundred forty".