1390332028 has 6 divisors (see below), whose sum is σ = 2433081056. Its totient is φ = 695166012.

The previous prime is 1390332001. The next prime is 1390332089. The reversal of 1390332028 is 8202330931.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 173791500 + ... + 173791507.

Almost surely, 2^1390332028 is an apocalyptic number.

It is an amenable number.

1390332028 is a deficient number, since it is larger than the sum of its proper divisors (1042749028).

1390332028 is a wasteful number, since it uses less digits than its factorization.

1390332028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347583011 (or 347583009 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 1390332028 is about 37287.1563410245. The cubic root of 1390332028 is about 1116.1078836538.

Adding to 1390332028 its reverse (8202330931), we get a palindrome (9592662959).

The spelling of 1390332028 in words is "one billion, three hundred ninety million, three hundred thirty-two thousand, twenty-eight".