1629420 has 48 divisors (see below), whose sum is σ = 4915680. Its totient is φ = 400896.

The previous prime is 1629409. The next prime is 1629427. The reversal of 1629420 is 249261.

1629420 = 182² + 183² + ... + 221².

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 in 15 ways as a sum of consecutive naturals, for example, 265 + ... + 1824.

It is an arithmetic number, because the mean of its divisors is an integer number (102410).

2^1629420 is an apocalyptic number.

1629420 is a gapful number since it is divisible by the number (10) 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 1629420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2457840).

1629420 is an abundant number, since it is smaller than the sum of its proper divisors (3286260).

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

1629420 is a wasteful number, since it uses less digits than its factorization.

1629420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2114 (or 2112 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 1629420 is about 1276.4873677401. The cubic root of 1629420 is about 117.6732317259.

The spelling of 1629420 in words is "one million, six hundred twenty-nine thousand, four hundred twenty".