1625027890 has 8 divisors (see below), whose sum is σ = 2925050220. Its totient is φ = 650011152.

The previous prime is 1625027869. The next prime is 1625027897. The reversal of 1625027890 is 987205261.

It can be written as a sum of positive squares in 2 ways, for example, as 1533270649 + 91757241 = 39157^2 + 9579^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1625027897) 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 3 ways as a sum of consecutive naturals, for example, 81251385 + ... + 81251404.

Almost surely, 2^1625027890 is an apocalyptic number.

1625027890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1625027890 is a deficient number, since it is larger than the sum of its proper divisors (1300022330).

1625027890 is a wasteful number, since it uses less digits than its factorization.

1625027890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162502796.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 1625027890 is about 40311.6346728832. The cubic root of 1625027890 is about 1175.6740698449.

The spelling of 1625027890 in words is "one billion, six hundred twenty-five million, twenty-seven thousand, eight hundred ninety".