1390737228 has 24 divisors (see below), whose sum is σ = 3386143488. Its totient is φ = 443423376.

The previous prime is 1390737223. The next prime is 1390737233. The reversal of 1390737228 is 8227370931.

It is an interprime number because it is at equal distance from previous prime (1390737223) and next prime (1390737233).

It is a self number, because there is not a number n which added to its sum of digits gives 1390737228.

It is not an unprimeable number, because it can be changed into a prime (1390737223) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 2519176 + ... + 2519727.

It is an arithmetic number, because the mean of its divisors is an integer number (141089312).

Almost surely, 2^1390737228 is an apocalyptic number.

It is an amenable number.

1390737228 is an abundant number, since it is smaller than the sum of its proper divisors (1995406260).

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

1390737228 is a wasteful number, since it uses less digits than its factorization.

1390737228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5038933 (or 5038931 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 42.

The square root of 1390737228 is about 37292.5894515251. The cubic root of 1390737228 is about 1116.2162997199.

The spelling of 1390737228 in words is "one billion, three hundred ninety million, seven hundred thirty-seven thousand, two hundred twenty-eight".