1407820 has 24 divisors (see below), whose sum is σ = 3027024. Its totient is φ = 549696.

The previous prime is 1407811. The next prime is 1407823. The reversal of 1407820 is 287041.

It is a junction number, because it is equal to n+sod(n) for n = 1407791 and 1407800.

It is not an unprimeable number, because it can be changed into a prime (1407823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42 + ... + 1678.

It is an arithmetic number, because the mean of its divisors is an integer number (126126).

2^1407820 is an apocalyptic number.

1407820 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 1407820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1513512).

1407820 is an abundant number, since it is smaller than the sum of its proper divisors (1619204).

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

1407820 is a wasteful number, since it uses less digits than its factorization.

1407820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1689 (or 1687 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 1407820 is about 1186.5159080265. The cubic root of 1407820 is about 112.0767968193.

The spelling of 1407820 in words is "one million, four hundred seven thousand, eight hundred twenty".