1390652928 has 240 divisors, whose sum is σ = 4790831760. Its totient is φ = 397135872.

The previous prime is 1390652927. The next prime is 1390652987. The reversal of 1390652928 is 8292560931.

1390652928 is a `hidden beast` number, since 13 + 90 + 6 + 529 + 28 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390652927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 676350 + ... + 678402.

It is an arithmetic number, because the mean of its divisors is an integer number (19961799).

Almost surely, 2^1390652928 is an apocalyptic number.

1390652928 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1390652928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2395415880).

1390652928 is an abundant number, since it is smaller than the sum of its proper divisors (3400178832).

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

1390652928 is an equidigital number, since it uses as much as digits as its factorization.

1390652928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2094 (or 2065 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 1390652928 is about 37291.4591830355. The cubic root of 1390652928 is about 1116.1937459900.

The spelling of 1390652928 in words is "one billion, three hundred ninety million, six hundred fifty-two thousand, nine hundred twenty-eight".