4492561920 has 640 divisors, whose sum is σ = 18327969792. Its totient is φ = 911769600.

The previous prime is 4492561919. The next prime is 4492561961. The reversal of 4492561920 is 291652944.

It is a tau number, because it is divible by the number of its divisors (640).

It is a super-2 number, since 2×4492561920² = 40366225210068172800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 41986507 + ... + 41986613.

Almost surely, 2^4492561920 is an apocalyptic number.

4492561920 is a gapful number since it is divisible by the number (40) 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 4492561920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9163984896).

4492561920 is an abundant number, since it is smaller than the sum of its proper divisors (13835407872).

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

4492561920 is a wasteful number, since it uses less digits than its factorization.

4492561920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222 (or 206 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 4492561920 is about 67026.5762216749. The cubic root of 4492561920 is about 1650.0534932152.

The spelling of 4492561920 in words is "four billion, four hundred ninety-two million, five hundred sixty-one thousand, nine hundred twenty".