1356858990 has 144 divisors (see below), whose sum is σ = 3698843616. Its totient is φ = 344937600.

The previous prime is 1356858977. The next prime is 1356858991. The reversal of 1356858990 is 998586531.

It is a happy number.

1356858990 is a `hidden beast` number, since 1 + 3 + 56 + 8 + 589 + 9 + 0 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1356858991) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 19110655 + ... + 19110725.

It is an arithmetic number, because the mean of its divisors is an integer number (25686414).

Almost surely, 2^1356858990 is an apocalyptic number.

1356858990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1356858990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1849421808).

1356858990 is an abundant number, since it is smaller than the sum of its proper divisors (2341984626).

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

1356858990 is a wasteful number, since it uses less digits than its factorization.

1356858990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263 (or 201 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 54.

The square root of 1356858990 is about 36835.5669156863. The cubic root of 1356858990 is about 1107.0780467052.

The spelling of 1356858990 in words is "one billion, three hundred fifty-six million, eight hundred fifty-eight thousand, nine hundred ninety".