1630240 has 48 divisors (see below), whose sum is σ = 4027968. Its totient is φ = 622336.

The previous prime is 1630199. The next prime is 1630243. The reversal of 1630240 is 420361.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (1630243) 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, 3459 + ... + 3901.

It is an arithmetic number, because the mean of its divisors is an integer number (83916).

2^1630240 is an apocalyptic number.

1630240 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 1630240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2013984).

1630240 is an abundant number, since it is smaller than the sum of its proper divisors (2397728).

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

1630240 is a wasteful number, since it uses less digits than its factorization.

1630240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481 (or 473 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1630240 is about 1276.8085212748. The cubic root of 1630240 is about 117.6929679650.

The spelling of 1630240 in words is "one million, six hundred thirty thousand, two hundred forty".