3792780 has 72 divisors (see below), whose sum is σ = 12121200. Its totient is φ = 957312.

The previous prime is 3792779. The next prime is 3792781. The reversal of 3792780 is 872973.

It is an interprime number because it is at equal distance from previous prime (3792779) and next prime (3792781).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3792781) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2866 + ... + 3974.

It is an arithmetic number, because the mean of its divisors is an integer number (168350).

Almost surely, 2^3792780 is an apocalyptic number.

3792780 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 3792780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6060600).

3792780 is an abundant number, since it is smaller than the sum of its proper divisors (8328420).

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

3792780 is a wasteful number, since it uses less digits than its factorization.

3792780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1143 (or 1138 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 3792780 is about 1947.5060975514. The cubic root of 3792780 is about 155.9501813307.

The spelling of 3792780 in words is "three million, seven hundred ninety-two thousand, seven hundred eighty".