1658202378 has 64 divisors (see below), whose sum is σ = 3886755840. Its totient is φ = 461748672.

The previous prime is 1658202353. The next prime is 1658202407. The reversal of 1658202378 is 8732028561.

It is a Harshad number since it is a multiple of its sum of digits (42).

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, 1297876 + ... + 1299152.

It is an arithmetic number, because the mean of its divisors is an integer number (60730560).

Almost surely, 2^1658202378 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1658202378, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1943377920).

1658202378 is an abundant number, since it is smaller than the sum of its proper divisors (2228553462).

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

1658202378 is a wasteful number, since it uses less digits than its factorization.

1658202378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2051.

The product of its (nonzero) digits is 161280, while the sum is 42.

The square root of 1658202378 is about 40721.0311509913. The cubic root of 1658202378 is about 1183.6205893557.

The spelling of 1658202378 in words is "one billion, six hundred fifty-eight million, two hundred two thousand, three hundred seventy-eight".