1391128030 has 16 divisors (see below), whose sum is σ = 2505738960. Its totient is φ = 556071552.

The previous prime is 1391128027. The next prime is 1391128031. The reversal of 1391128030 is 308211931.

It is a self number, because there is not a number n which added to its sum of digits gives 1391128030.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1391128031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31824 + ... + 61603.

It is an arithmetic number, because the mean of its divisors is an integer number (156608685).

Almost surely, 2^1391128030 is an apocalyptic number.

1391128030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1391128030 is a deficient number, since it is larger than the sum of its proper divisors (1114610930).

1391128030 is a wasteful number, since it uses less digits than its factorization.

1391128030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94923.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 1391128030 is about 37297.8287571810. The cubic root of 1391128030 is about 1116.3208434828.

Adding to 1391128030 its reverse (308211931), we get a palindrome (1699339961).

The spelling of 1391128030 in words is "one billion, three hundred ninety-one million, one hundred twenty-eight thousand, thirty".