1630064880 has 120 divisors (see below), whose sum is σ = 5607922320. Its totient is φ = 424074240.

The previous prime is 1630064867. The next prime is 1630064897. The reversal of 1630064880 is 884600361.

It is a happy number.

1630064880 is a `hidden beast` number, since 1 + 6 + 3 + 0 + 0 + 648 + 8 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a super-2 number, since 2×1630064880² = 5314223026018828800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1911 + ... + 57129.

It is an arithmetic number, because the mean of its divisors is an integer number (46732686).

Almost surely, 2^1630064880 is an apocalyptic number.

1630064880 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 1630064880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2803961160).

1630064880 is an abundant number, since it is smaller than the sum of its proper divisors (3977857440).

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

1630064880 is a wasteful number, since it uses less digits than its factorization.

1630064880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55279 (or 55270 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 1630064880 is about 40374.0619705276. The cubic root of 1630064880 is about 1176.8875363039.

The spelling of 1630064880 in words is "one billion, six hundred thirty million, sixty-four thousand, eight hundred eighty".