1429890 has 64 divisors (see below), whose sum is σ = 4285440. Its totient is φ = 296640.

The previous prime is 1429889. The next prime is 1429907. The reversal of 1429890 is 989241.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2001 + ... + 2619.

It is an arithmetic number, because the mean of its divisors is an integer number (66960).

2^1429890 is an apocalyptic number.

1429890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1429890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2142720).

1429890 is an abundant number, since it is smaller than the sum of its proper divisors (2855550).

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

1429890 is a wasteful number, since it uses less digits than its factorization.

1429890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647.

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 1429890 is about 1195.7800801151. The cubic root of 1429890 is about 112.6594282820.

The spelling of 1429890 in words is "one million, four hundred twenty-nine thousand, eight hundred ninety".