1958628788 has 6 divisors (see below), whose sum is σ = 3427600386. Its totient is φ = 979314392.

The previous prime is 1958628773. The next prime is 1958628821. The reversal of 1958628788 is 8878268591.

It can be written as a sum of positive squares in only one way, i.e., 1693980964 + 264647824 = 41158^2 + 16268^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1958628788.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 244828595 + ... + 244828602.

It is an arithmetic number, because the mean of its divisors is an integer number (571266731).

Almost surely, 2^1958628788 is an apocalyptic number.

It is an amenable number.

1958628788 is a deficient number, since it is larger than the sum of its proper divisors (1468971598).

1958628788 is a wasteful number, since it uses less digits than its factorization.

1958628788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489657201 (or 489657199 counting only the distinct ones).

The product of its digits is 15482880, while the sum is 62.

The square root of 1958628788 is about 44256.3982718883. The cubic root of 1958628788 is about 1251.1730402769.

The spelling of 1958628788 in words is "one billion, nine hundred fifty-eight million, six hundred twenty-eight thousand, seven hundred eighty-eight".