3915780 has 96 divisors (see below), whose sum is σ = 12700800. Its totient is φ = 890880.

The previous prime is 3915761. The next prime is 3915781. The reversal of 3915780 is 875193.

It is a super-4 number, since 4×3915780⁴ (a number of 27 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (3915781) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11046 + ... + 11394.

It is an arithmetic number, because the mean of its divisors is an integer number (132300).

Almost surely, 2^3915780 is an apocalyptic number.

3915780 is a gapful number since it is divisible by the number (30) 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 3915780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6350400).

3915780 is an abundant number, since it is smaller than the sum of its proper divisors (8785020).

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

3915780 is a wasteful number, since it uses less digits than its factorization.

3915780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389 (or 387 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 33.

The square root of 3915780 is about 1978.8329894157. The cubic root of 3915780 is about 157.6181023981.

The spelling of 3915780 in words is "three million, nine hundred fifteen thousand, seven hundred eighty".