1328626590 has 32 divisors (see below), whose sum is σ = 3298661280. Its totient is φ = 342082944.

The previous prime is 1328626589. The next prime is 1328626591. The reversal of 1328626590 is 956268231.

It is an interprime number because it is at equal distance from previous prime (1328626589) and next prime (1328626591).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1328626591) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 762709 + ... + 764448.

It is an arithmetic number, because the mean of its divisors is an integer number (103083165).

Almost surely, 2^1328626590 is an apocalyptic number.

1328626590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1328626590 is an abundant number, since it is smaller than the sum of its proper divisors (1970034690).

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

1328626590 is a wasteful number, since it uses less digits than its factorization.

1328626590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1527196.

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 1328626590 is about 36450.3304511770. The cubic root of 1328626590 is about 1099.3457790257.

The spelling of 1328626590 in words is "one billion, three hundred twenty-eight million, six hundred twenty-six thousand, five hundred ninety".