1340287490 has 32 divisors (see below), whose sum is σ = 2523798000. Its totient is φ = 511802368.

The previous prime is 1340287451. The next prime is 1340287523. The reversal of 1340287490 is 947820431.

It can be written as a sum of positive squares in 8 ways, for example, as 777127129 + 563160361 = 27877^2 + 23731^2 .

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, 155 + ... + 51774.

Almost surely, 2^1340287490 is an apocalyptic number.

1340287490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1340287490 is a deficient number, since it is larger than the sum of its proper divisors (1183510510).

1340287490 is a wasteful number, since it uses less digits than its factorization.

1340287490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52054.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 1340287490 is about 36609.9370390062. The cubic root of 1340287490 is about 1102.5526091414.

The spelling of 1340287490 in words is "one billion, three hundred forty million, two hundred eighty-seven thousand, four hundred ninety".