1629149290 has 16 divisors (see below), whose sum is σ = 2935171368. Its totient is φ = 651059136.

The previous prime is 1629149261. The next prime is 1629149323. The reversal of 1629149290 is 929419261.

It can be written as a sum of positive squares in 4 ways, for example, as 1464822529 + 164326761 = 38273^2 + 12819^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63597 + ... + 85456.

Almost surely, 2^1629149290 is an apocalyptic number.

1629149290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1629149290 is a deficient number, since it is larger than the sum of its proper divisors (1306022078).

1629149290 is a wasteful number, since it uses less digits than its factorization.

1629149290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150153.

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 1629149290 is about 40362.7215385682. The cubic root of 1629149290 is about 1176.6671466568.

The spelling of 1629149290 in words is "one billion, six hundred twenty-nine million, one hundred forty-nine thousand, two hundred ninety".