1656358340 has 96 divisors (see below), whose sum is σ = 4467294720. Its totient is φ = 501405696.

The previous prime is 1656358339. The next prime is 1656358357. The reversal of 1656358340 is 438536561.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22076 + ... + 61644.

It is an arithmetic number, because the mean of its divisors is an integer number (46534320).

Almost surely, 2^1656358340 is an apocalyptic number.

1656358340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1656358340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2233647360).

1656358340 is an abundant number, since it is smaller than the sum of its proper divisors (2810936380).

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

1656358340 is a wasteful number, since it uses less digits than its factorization.

1656358340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39621 (or 39619 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 41.

The square root of 1656358340 is about 40698.3825231421. The cubic root of 1656358340 is about 1183.1816700864.

The spelling of 1656358340 in words is "one billion, six hundred fifty-six million, three hundred fifty-eight thousand, three hundred forty".