1630276240 has 80 divisors (see below), whose sum is σ = 3957090480. Its totient is φ = 624015360.

The previous prime is 1630276229. The next prime is 1630276261. The reversal of 1630276240 is 426720361.

It can be written as a sum of positive squares in 8 ways, for example, as 82011136 + 1548265104 = 9056^2 + 39348^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 176046 + ... + 185074.

It is an arithmetic number, because the mean of its divisors is an integer number (49463631).

Almost surely, 2^1630276240 is an apocalyptic number.

1630276240 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 1630276240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1978545240).

1630276240 is an abundant number, since it is smaller than the sum of its proper divisors (2326814240).

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

1630276240 is a wasteful number, since it uses less digits than its factorization.

1630276240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9140 (or 9134 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 1630276240 is about 40376.6794077968. The cubic root of 1630276240 is about 1176.9384005777.

The spelling of 1630276240 in words is "one billion, six hundred thirty million, two hundred seventy-six thousand, two hundred forty".