5642780 has 48 divisors (see below), whose sum is σ = 13928544. Its totient is φ = 1893120.

The previous prime is 5642743. The next prime is 5642783. The reversal of 5642780 is 872465.

It is a super-2 number, since 2×5642780² = 63681932256800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5642783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1874 + ... + 3846.

It is an arithmetic number, because the mean of its divisors is an integer number (290178).

Almost surely, 2^5642780 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5642780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6964272).

5642780 is an abundant number, since it is smaller than the sum of its proper divisors (8285764).

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

5642780 is a wasteful number, since it uses less digits than its factorization.

5642780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2006 (or 2004 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 5642780 is about 2375.4536408863. The cubic root of 5642780 is about 178.0318505476.

The spelling of 5642780 in words is "five million, six hundred forty-two thousand, seven hundred eighty".