1340520858 has 24 divisors (see below), whose sum is σ = 2947814688. Its totient is φ = 440170632.

The previous prime is 1340520823. The next prime is 1340520893. The reversal of 1340520858 is 8580250431.

It is a happy number.

1340520858 is a `hidden beast` number, since 13 + 40 + 520 + 85 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (1340520823) and next prime (1340520893).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 554566 + ... + 556977.

It is an arithmetic number, because the mean of its divisors is an integer number (122825612).

Almost surely, 2^1340520858 is an apocalyptic number.

1340520858 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1340520858 is an abundant number, since it is smaller than the sum of its proper divisors (1607293830).

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

1340520858 is a wasteful number, since it uses less digits than its factorization.

1340520858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111618 (or 1111615 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The square root of 1340520858 is about 36613.1241223690. The cubic root of 1340520858 is about 1102.6165967976.

The spelling of 1340520858 in words is "one billion, three hundred forty million, five hundred twenty thousand, eight hundred fifty-eight".