56783340 has 72 divisors (see below), whose sum is σ = 173365920. Its totient is φ = 15043584.

The previous prime is 56783339. The next prime is 56783359. The reversal of 56783340 is 4338765.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 56783295 and 56783304.

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, 29116 + ... + 31004.

It is an arithmetic number, because the mean of its divisors is an integer number (2407860).

Almost surely, 2^56783340 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 56783340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86682960).

56783340 is an abundant number, since it is smaller than the sum of its proper divisors (116582580).

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

56783340 is a wasteful number, since it uses less digits than its factorization.

56783340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2071 (or 2066 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The square root of 56783340 is about 7535.4721152692. The cubic root of 56783340 is about 384.3618821619.

The spelling of 56783340 in words is "fifty-six million, seven hundred eighty-three thousand, three hundred forty".