1629428 has 6 divisors (see below), whose sum is σ = 2851506. Its totient is φ = 814712.

The previous prime is 1629427. The next prime is 1629431. The reversal of 1629428 is 8249261.

It can be written as a sum of positive squares in only one way, i.e., 1024144 + 605284 = 1012^2 + 778^2 .

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1629394 and 1629403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1629427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203675 + ... + 203682.

It is an arithmetic number, because the mean of its divisors is an integer number (475251).

2^1629428 is an apocalyptic number.

It is an amenable number.

1629428 is a deficient number, since it is larger than the sum of its proper divisors (1222078).

1629428 is a wasteful number, since it uses less digits than its factorization.

1629428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407361 (or 407359 counting only the distinct ones).

The product of its digits is 6912, while the sum is 32.

The square root of 1629428 is about 1276.4905013356. The cubic root of 1629428 is about 117.6734243066.

The spelling of 1629428 in words is "one million, six hundred twenty-nine thousand, four hundred twenty-eight".