1628790229 has 4 divisors (see below), whose sum is σ = 1776862080. Its totient is φ = 1480718380.

The previous prime is 1628790227. The next prime is 1628790269. The reversal of 1628790229 is 9220978261.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1628790229 - 2¹ = 1628790227 is a prime.

It is a super-3 number, since 3×1628790229³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1628790227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74035909 + ... + 74035930.

It is an arithmetic number, because the mean of its divisors is an integer number (444215520).

Almost surely, 2^1628790229 is an apocalyptic number.

It is an amenable number.

1628790229 is a deficient number, since it is larger than the sum of its proper divisors (148071851).

1628790229 is a wasteful number, since it uses less digits than its factorization.

1628790229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148071850.

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 1628790229 is about 40358.2733649496. The cubic root of 1628790229 is about 1176.5806953357.

The spelling of 1628790229 in words is "one billion, six hundred twenty-eight million, seven hundred ninety thousand, two hundred twenty-nine".